Someone made a portal physics thread earlier today so I made

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>>377288531
This one loops.

>>377288531
if it came down with alot of force yeah that's what would happen

>>377288531
No, because the cube would need momentum in order to fly like that.

If you're just pressing a portal against it, no matter what the velocity is, the cube will always have the same velocity in the blue portal every time.

>>377288625
>>377288531
>what is momentum?

>>377288653
>>377288686
It would be the double bounce trampoline effect.
The force of the moving portal platform smashing against the lowers one transfers it's momentum through reverberation.

oh yeah, if the plate with the cube on it smashed into the portal, then it would fly off

>>377288531
What the fuck is shaking in this?

>>377288531
the cube is being pushed out of the portal at the velocity the red portal moves, no matter how you look at it, the cube doesn't materialize outside the other portal.

>>377288761
The force of the platform hitting the other platform.
The force vibrates through the platform.
Put a penny on a desk then slam your hand on the desk, it will jump up a little bit.

>>377288531
i don't understand your gif.
but the cube does fly.

>>377288686
Here's the deal. Both sides are affecting the cube, yes? So the momentum isn't pure.

The cube wouldn't bounce nearly that much. Most of that force is going to continue traveling downwards in the direction of the piston.

All portals do are displace an object in space. They don't produce or enact momentum on objects caught inside them. It's A.

the cube would just go :puff:

>>377289739
just like my erection

portals don't exist

it's B, and let me explain why. Please keep in mind portals violate physics as is, so this is just what is most likely to happen with what we know.

The speed that the cube moves through the stationary portal is solely determined by how fast the piston portal is pushed onto the cube. Thus, if the pistol portal comes down at 50 m/s, then the cube exits the stationary portal at 50 m/s. This would seem to create energy out of nothing, but portals have no problem doing this with potential energy from gravity, so obviously the conservation of energy isn't important. What is important is that the portal does not have an effect on you once you exit it. If you come out of a portal at 50m/s, you don't "reset" momentum.

Thus, how fast you come out of the exit portal is speed that you maintain, and because we established that the speed you exit is determined by how fast you enter, REGARDLESS of if you are providing the momentum, or if the portal itself provides it, we can conclude that B is the most likely scenario.

This argument totally leaves out things like frame of reference, for sake of brevity.

The hula hoop analogy is flawed because both sides are moving at the same speed, the slinky argument is flawed because the speed at which you enter the slinky is not inherently tied to the speed at which you exit, as we can demonstrate from simple testing (also, slinkies don't violate the laws of physics as we know them with regularity, as do portals)

>>377290180
clean and correct answer! ding ding ding we have a winner.

>>377290180

The thing is, that orange portal IS moving. That entire space is moving and being dragged towards the cube by the blue portal. The grid that the world exists on is being warped to fold those portals into the same space.

>>377290796
I don't know of any in-game or canon media that describes the exact functioning of the portals. Do you have hard evidence, or is this just speculation?

Alright so a portal has some magic ability to generate momentum from a stationary object?

The reason I ask is imagine the portal wasn't there, imagine that there was instead a platform with just a hole for the object heading down towards it at the same velocity as the diagram in OPs picture. Should it be true then the box would lift exponentially off it's ground, through the hole in the top platform and into the air before coming back down correct?

I'm sorry but there would need to be a transfer of inertia in some way to which the box is gaining momentum. When the platform collides with the other platform it would lose all movement, the box will not gain it as it does not even come into contact with the platform

>>377288531
this would be like if you catch a bug in a bug-net, you slamming the net down around the bug doesn't suddenly cause the bug to be propelled up into the air,

>>377290976
>this would be like if you catch a bug in a bug-net, you slamming the net down around the bug doesn't suddenly cause the bug to be propelled up into the air,
That's because the earth is large and absorbs the shock.

>>377290909

It's based on the actual theory behind how a wormhole would work. In-game canon is supposed to be that portals can't be on moving objects but they through one into the second game that can magically do it despite the rest of the game making them close if the platform moves.

In-game the portal just hits the cube and stops moving because it can't push the cube out of the other portal.

>>377290923
Portals in game already effect momentum, since momentum is a vector. If your direction changes, your momentum changes too.

And yes, if the two portals are moving at different speeds, then any object that goes through them will have the absolute value of its momentum changed, not just the direction.

>>377290923
Both sides of the hula hoop/toliet paper roll/window/door/whatever are moving together. It's not an equal comparison. On one side you have something being pushed into what seems to be like a hula hoop, but on the other side we have what seems to be a cube exiting at a high speed.

If you were just in the room with the exit portal, from your perspective, wouldn't the cube exit at like 10km/s, then just stop and plop down? Looking through this portal, the cube would be approaching the portal at this speed and be launched.

>>377288531
>>377290180
It's A. The instant an object enters the portal is the moment it materializing on the other side. The portal doesn't convey any energy to an object that enters/exits it. The fact that the portal is moving at speed merely means that a stationary object will leave that much faster on the other side, but the portal itself won't impart any energy on an otherwise stationary object to make bounce, fly or whatever it is b fags would have you believe

>>377290180
I have to disagree with this. The momentum is carried by the object, not the portal. The speed of the portal moving towards the object would have no impact as to its exit velocity.

To visualize, the image above would be as if an elevator was crashing down above your head. As you stare upward, you can see a light in the center. As it rapidly approaches, you stare up and watch the blue sky above grow larger as the hole becomes closer. Eventually, the entire elevator crashes around you, but you do not fly into the air. Instead, you find yourself standing on an angled platform safe from harm.

The rules of a "portal" seem to specify that a portal has no intrinsic momentum, as it is simply a door. An object in motion stays in motion, and vice versa. An object without momentum will not move as it exits a portal, as the portal cannot, and does not affect the matter passing through it. It merely relocates it.

>>377291083
How are they meant to define moving, according to in-world rules? Because the earth is moving

>>377291083
In game tests aren't "canon", oddly enough, because the devs said they had to use a whole bunch of programming hacks to merely approximate the portals.

Secondly, our theoretical physics regarding wormholes has no bearing on how portals in portal work, as this is a series where an advanced AI is powered by a potato, it's science fiction without consistent explanation. All we can do is make assumptions based on the behaviour we know to be intended.

>>377291149
So the cube exits at 10km/s, and then just stops? Why? You agree it exits at that speed, and say the portal doesn't affect it's momentum, but it just stops?

>>377291103

The thing is, you can be the cube, too.

We can tall about perspective all day, but the perspective should be the room as a whole. The piston is the only thing moving from all perspectives. From that we can tell that the space itself is bring brought down on the cube. You just wouldn't feel that movement because it's the space itself moving and not the objects within it.

>>377291184
>Instead, you find yourself standing on an angled platform safe from harm.
you don't, though.

>>377291019
okay so this IS all a joke, got it

>>377291195

Okay, but if we can't use in-game science or real world theory there's nothing to discuss.

>>377291193
Moving with respect to each other, I guess. If you put two portals on the same moving platform, it should work just fine. Afags and Bfags would agree on everything.

>>377291243
The cube isn't "moving" at 10km/s. It enters the portal, and is rematerialized through the other portal at 10km/s stationary. If it entered through a portal moving 10km/s, while being tossed into the portal at 10km/s, it would rematerialize at 20km/s, 10km/s in a vector.

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What if the moving platform stops halfway through the cube? Does it still get ejected?

>>377291372
There's no "rematerialization". The portal is a hole in space, not a teleporter that deconstructs and reconstructs stuff going through it.

>>377291436
It either ejects at half the speed, or if the stress from the sudden stop is too much, breaks in half.

>>377291292
If the cube is exiting the portal at all, it has force behind it, due to the fact that the exit portal isn't moving. This is simply undebatable.

>>377291365
Hence why it's kind of a dumb question. From all we know, it would be B, but a dev could just say it's A and we have to accept that.

>>377291372
Even supposing the portal dematerializes and rematerializes things (which is never, ever stated in game), it would still do so in layers, as stopping the portal halfway down the cube would only give us half the cube on the other side. So why wouldn't the layer above be "pushed up" at that speed?

Either way, it's irrelevant, as you're basically just making something up. This is never even HINTED at in game, iirc

>>377291436
If I only pull on the end of a rope, does the whole rope move?

>>377291306
You do though. See >>377291372 and >>377291436. A new parameter is made which is not momentum, but instead speed of relocation. If a portal could affect momentum, it could suck an object through by moving slightly over 50% the way through. This however is not the case, as it would cause logic loops.

>>377288531
This is totally correct.
Slamming a hula-hoop at high speed at a box will make the box propel out the other side with infinite speed.
Get your facts straight trolls.

>>377288531
Why do you fuckers think it flies in a straight line? You're all retarded. It won't just pop out, but it won't go into orbit, either. Depending on how quickly the portal crashes down on the cube, the cube will have a relative speed to the portal's exit. If the portal's exit is stationary, then the cube will retain its relative velocity and be flung out a short distance

>>377291573
Portals themselves are logic loops. That's not an argument.

>>377291372
>at 10km/s stationary

>>377291576
>Get your facts straight trolls.
Dropping a 6 ton hula hoop will cause it to bounce very far.

>>377291573
>Portals rematerialize and write parameters to objects

This is stated literally nowhere. This is fanfiction tier shit.

>>377291243
The cube isn't affected by the speed of the portal. Think of it like Star Trek's teleportation. Object disappears on one end and reappears on the other. Portal doesn't interact with the object apart from transporting it to the other end. If a portal is moving at speed the transmission/teleportation occurs faster but a stationary object wouldn't get any additional energy to jump out on the other side.

Similarly if you were running towards a stationary portal you'd the speed at which you begin to enter is the speed you begin to exit the portal. If you were running towards a portal that's also moving towards you, you'd enter and exit at the same speed, only the duration of transit would be shorter compared to stationary portal since it would take less time for your body to transit fully through the portal

>>377291573
those are retarded posts from people who fail to understand the problem. there is noo need to see them.

>>377290923
>some magic ability
Treat it like a collision. In reality, I suppose some Lenz's law-like effect would cause the portal to slow down as it engulfs the cube, but more force could be applied to keep the portal's velocity constant, which in turn would equal the force exerted on the cube. As the force accelerates the cube, it will not just pop out

>>377291631
It would break the object in half although it was never moving. Breaking it through *what* though would be the problem. To the outside looking in, it makes no sense, but to the object, it is only the world around it moving. This is more plausible than the portals being able to manipulate the conservation of energy. At worst, the object would get bumped up slightly, as the trampoline effect suggests.

>>377291649
>"I didn't read shit lol"

>>377291721
>this whole post

This is whole thing is basically like asking what would happen if you moved faster than the speed of light

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Explain this A fags.

Something like this would apply to a Stargate, but not to a portal.

>>377291856
they can't, anon. they will just make up some nonsense.

>>377291715
>the teleportation occurs faster

Teleportation in portal is instant, and shown to preserve momentum. It's not like in star trek where you're converted to an energy pattern and re materialized.

Furthermore, all speed is relative. Me running at 5 m/s is the same as me standing still, on a treadmill moving me forward at 5m/s, or running 10m/s on a treadmill moving me back at 5m/s. If I'm approaching an object at 5m/s and the object is approaching me at 5m/s, We are moving toward eachother at 10m/s.

>>377291797
Portals break the conversation of energy all the time. Put a portal on the floor and on the roof directly above/below you, infinite energy. Conversation of energy is shown to not be a necessary requirement of portals.

>>377291856
What happens if you stop halfways through, will the rest of the cube be sucked in? I don't think so. The cube is probably suspended as long as it is inside the portal.

>>377291993
>I don't think so
This isn't an argument. Show why it would not.

>>377291243
Yeah it's elementary v=s/t since the distance cube travelled in real space is 0 then the speed of the portal is irrelevant since you'll always be dividing zeroes

>>377292046
But the real distance it travels isn't 0, as it travels space outside the portal, not the space inside it. See
>>377291856

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OP is obviously a troll what the fuck.

>>377292046
>Yeah it's elementary v=s/t
and you aren't able to understand that

>>377292025
I don't think I can describe a portal using classical physics, sorry. Ask an astrophysicist

>>377291993
Show your work.

>>377292189
>I can't explain
Thank you for admitting you have no argument.

>>377292046
For it to stop, there needs to be a force which slows it down. What force is that?

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>Bfags got so fucking buttblasted at the end of the last thread that they insisted to make another thread for full two hours

>>377292230
Why are you so pissy? Can you instead explain how the portal can do work on the cube?

You can't describe this using classical physics in a sensible way, the fact that energy isn't conserved in a portal is reason enough

>>377292296
>implying there hasn't been multiple threads about this daily for the past week.
Whichever side the OP picks, he's just baiting.

>>377292296
there is no irony, your just really, really dumb for not seeing the differnce between two objects, both moving, and two objects, one moving.

>>377292296
Can you explain the irony to a retard like myself?
1+1=/=3
The blue portal is stationary.
What's the issue?

>>377291856
>>377291436
>>377290923
>>377290180
Although these are some good arguments, one vital thing i think a lot of people are confused about is where the transfer of momentum goes. Of course B is implying that when a moving force hits an object it has to move, and what A does not answer is that somehow momentum is not conserved in this closed system.

I'm siding with A however, as people often forget that momentum can transfer into the earth/ground; eg. a car hitting a bollard, the kinetic energy of the car transfers into friction and into a tiny movement in the bollard and earth.

For this example however, when the moving portal does not actually hit the cube, it his hitting the ground beneath it, and what >>377291856 tries to explain is that the normal force goes into the cube. But forgets that the moving portal has its own weight and instead of the normal force being pushed onto the cube, it pushes onto itself; making it stationary.

Willing to try and clarify some stuff.

>>377291856
The cube didn't move at all, a hole in space moved

>>377292486
But what causes the box to move from the blue portal to 1 foot away from the blue portal?
What causes this movement to stop suddenly?

>>377288531
THIS TROLL IS SO FUCKING OLD PORTAL CAME OUT IN 2007 LITERALLY A DECADE AGO DELETE THIS THREAD REEEEEEEEEEE

>>377292486
>momentum can transfer into the earth/ground
Momentum doesn't have to be conserved, you know. If the ground doesn't move, it hasn't gained momentum just because there's friction. This tiny movement of the ground beneath the car is rather insignificant in a big collision

>>377291979
The process of teleportation is instant for each particle as soon as ot enters crosses the portal's horizon. The time for an object to fully transit through the horizon, in real space, isn't instant and that's the only variable that is affected by portal's speed.

It would take longer for an object to fully transit through the portal if the portal is moving away from you simply because it would take longer for all the object's particles to reach the horizon in real space and vice versa. That said the speed at which an individual particle and object as a whole touch the horizon is the speed at which they instantly resume their course on the other side, regardless of entry portal's speed or direction of movement

>>377292560
If the hole in space is moving, then why does it suddenly stop moving after the box passes through it?

>>377292573
im assuming with A, it doesnt actually travel any distance, since the stationary portal is a sloped surface, the only distance it travels is the force being applied by gravity.

imagine if the stationary portal was facing vertically, then the cube will just "appear" instead of hopping a distance.

>>377291518
>If the cube is exiting the portal at all, it has force behind it, due to the fact that the exit portal isn't moving. This is simply undebatable.

How is it even possible for the entrance portal to be moving and the exit portal not? I would assume that they're both moving, and it's just not apparent since you're moving aswell. Imagine you look down the exit portal while the piston with the blue portal is moving to look at yourself looking at the exit portal. Now you can see yourself and the portal moving upwards.

>arguing classical physics and conservation of energy
>can easily produce an infinitely large potential well with paired portals, which implies that fields ignore portals

If I hold a magnet behind a wall with a portal on it, would a charged box be attracted to that magnet?

>>377292701
Because the hole in space is attached to the big piston thing which contacts the platform the cube is resting on.

>>377292705
Even so, the box emerges from the blue portal at an upward angle. Gravity can not cause that.

Cube doesn't re-enter the room. The room re-engulfs the cube. The cube has no velocity, part of the room's space curviture does. The cube doesn't gain momentum just because it would be weird to look at if you looked at the orange hole.

>>377292735
I don't think so.
I think you would be instead affecting the wall behind wherever the exit portal is attached, assuming that portals are double sided.

>>377292363
see
>>377291979

>>377292746
But the hole in space is attached to the stationary platform. That platform does not move while the piston moves.

>>377292735
To have an argument about this, we must assume that the piston on which the portal has been placed is doing work on the cube. Either the piston will decelerate as it comes down on the cube, or the portal goes on electricity or something and consumes more energy as it does work on objects. This is a logical premise I think we all can work with

>>377292815
So the room is moving?

>>377292781
I probably misinterpreted your first question but ill try my best, someone said earlier that even if you put a coin on the table, and hit around the coin, it will still jump, probably explaining how it just "hops"

>>377292853
Do you mean the ramp when you say platform? Because theres no portal on the platform the cube sits on

>>377291856
The speed of the portal only affects the time it takes for the cube to fully transit through the portal. The cube's velocity is 0m/s as it is stationary and hasn't moved in real space.

>>377292912
Yes, the ramp. the hole is not moving here.

>>377292897

The room is folding would be the most accurate statement.

>>377292815
Speed and velocity are both relative to an observer. You can't really say the cube is stationary, because it isn't stationary relative to the portal, and that's what matters here.
>>377292852
>teleportation in portal is instant and shown to preserve momentum
Don't give a shit, conservation of momentum isn't very important
>all speed is relative
yes
>portals break the conservation of energy all the time
Exactly, that's why it's hard for me to draw any diagrams and try to explain it rationally, because it isn't very logical. I think this >>377292856 can help, though

>>377292958
So? I don't see your point here?

>>377292903
Imagine the very instant your hand touches the table the penny no longer exists. Did any of the energy from your hand hitting the table have time to reach it?

>>377292973

Just because something appears to be moving upwards because your elevator is coming down doesn't mean it keeps raising when you hit the bottom.

The piston is moving part of the world downward. The entire room isn't raising to hit the piston.

>>377292968
I'm starting to understand.
If you were to stand in the room, why wouldn't you perceive the room folding?
I'm not trying to argue anymore, I just want to learn.

>>377292997
The point is that the hole is not moving.

>>377293050
no?

>>377291856
The cube doesn't travel. Its position in 3D space is remapped - this doesn't use velocity

>>377293120
Yes thats nice dear.

>>377293164
How?

>>377293139
I probably should have actually read the reply chain instead of just replying to you
Then the penny doesn't bounce, so as the piston slams into the platform, the cube is already off the platform meaning it doesn't get affected by the vibrations

>>377293080

This is where it gets weird.

If you imagine space itself as a grid attached to the world, that grid is expandong and condensing at certain points in order to reach the cube. Your perception will always perceive this grid as having perfect squares because light is bending with the grid as well.

I wish I was in a position I could try to animate this, but basically seeing reality as normal is an optical illusion.

>>377293189
Via portal

>ITT A-fags make up bullshit about how portals work, none of which is stated in game, or even implied, in a backwards way to justify their conclusion, rather than looking at the evidence we know and coming to a conclusion based on evidence, like B-fags do.

At least it's difference from "muh hoops"

The problem is that the cube isn't moving through the portal, the space is bending and moving around the cube.

>ITT people use real world physics to explain the mechanics of something that is physically impossible

Someone post the original fucking image

>>377293216
I might need clarification but since the force from the piston does not make it jump, what other force will push it upward?

>>377293243

How else would you connect two points in space?

>>377293064
There is no difference between an object moving upwards and everything else in the universe moving downwards. To be fair, there isn't anything called up or down in the universe, these are just useful concepts

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>>377293218
>expandong

>>377293307
Why do A fags never put is this way?
This is something I can understand, not some bullshit about hula hoops.

>>377292296
>afags are retarded and assume that everyone is one person and also incapable of understanding context
Go figure.

For all the mentally deficient A fags: imagine that the cube is on a tall platform that also fits through the portal. Does the cube stop moving then?

>>377293064
>>377293363
If there is relative movement between two bodies, work must be done on one of them to make them stationary to one another

>>377293337
Its not being pushed upwards, its position in space has changed so that it is outside/above the other portal, It'll probably immediately fall down and either bounce off the lip and fall to the floor or fall backwards into the portal and stop existing

>>377293414
>i-i-it totally wasn't me!!! i swear!!!

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It's A dumb retard.

Velocity does not appear from nothing, cube has 0.
And no, you can just slat the relativity theory and b done, it does not work that way. In fact, it is not even applicable here in a way to support YOUR shitty theory. If anything, it proves A, cube just slides down.

>>377293318
It is not impossible per se, the idea of portals through space/time been discussed since ages ago.

>>377292632
>It would take longer for an object to fully transit through the portal if the portal is moving away

> is the speed at which they instantly resume their course on the other side

This is a contradiction. If the particles instantly regain their pre-portal speed, but the transition speed of the object differs from that speed, the object will be stretched or squished by the transition. In the case of a stationary cube, where the particles resume to speed 0 after transition, the whole cube would end up as a 1-particle-think pancake on the surface of the portal.

To get scenario A, the behaviour would need to be:
>While the object is transiting through the portal, its speed with respect to the exit portal is its speed with respect to the entrance portal
>Once the object has done transiting, its speed with respect to the exit portal changes to its pre-portaling speed with respect to the exit portal.

>>377293453
I'm retarded and keep thinking the portals are in some way touching because my brain is off. It would touch the platform it was previously sitting on and slide down the ramp, or maybe the vibrations would then affect it

>>377293363

But we can see that the acting force is the piston. If it turned out that the entire room was being shoved upwards by a piston from below the room then I would agree with B.

Hello, I am an Afag and I love penis. I am objectively wrong at physics and basic logic.

>>377292815
At what point does the cube stop being influenced by the portal? For example, if the orange didn't hit the platform, but could keep moving around, would this cause the cube appear to fly around the room on the other side? This doesn't seem like it would make much sense, but it should be acceptable based on what you are saying.

>>377293625
>being this insecure and pathetic
>not being able to defend his position
>resorting to shitposting

classic B-fag

>>377293610

Yeah it slides down from two acting forces of gravity acting upon it.

>>377293562
B. The hand outside the portal is moving the speed of the train because muh linking of space

>>377293613
The piston is accelerating the cube, but according to A-fags, the cube immediately decelerates upon exiting the portal.

>>377293518
>>377293625
WELP ITS CONFIRMED GUYS AFAGS ARE ALL WRONG
WE CAN ALL GO HOME NOW

>>377293453
i thought portals were basically holes in space which conserve the varibles of light/particles (heat, momentum, angle of velocity, etc.) and instantaneously move them from one x,y,z coordinate to another. I think that people think A and B differently due to their understanding of how portals work, which is of course fine since portals are purely theoretical.

>>377293736
Yes thats what portals are. what about it
I've been up for too long to be talking about portals

>>377293653
>afags incapable of understanding how his arguments are completely and utterly retarded
Go figure.

>>377293683
No it does not.

In your head, what is happening inside orange portal is Cube moving upwards like it is being accelerated by piston, but it ISN'T.

The only acceleration here has the piston with blue portal but it DOES not transfer it to cube in any way.

See what >>377293307 said. It is sure hard to wrap your head around it because you use normal physics understanding.

There is no acceleration happens. If anything, supposedly orange portal and the space it is atatched to SHOULD have acceleration but it is impossible as well.

>>377293627

It should only "travel" so far. Eventually it vecomes connected with a more squarish portion of the grid. To us it would look like it was suddenly slowing down, but reality is that space is just normalizing around it. It should "travel" as far as the portal moves until gravity has brought it to the ground.

Essentially it would be like a water hose. Everything in the hose is moving out at high pressure and then losing momentum as it leaves the hose and reaches a lower pressure environment where it can expand.

>>377293562
This is literally the opposite of the situation we're discussing, it's as if the cube went halfway through the orange portal on the ramp and then the blue portal slammed on the ground. Either the cube would fall off the blue portal because half of it is being pulled that way because gravity, or if you found a way to balance the cube between both portals, the impact of the blue portal and the half a cube with the platform would make the cube jump out the orange portal, obviously. In this case, the arm gets torn off.

>>377293683

The cube stops "moving" when the blue portal stops.

>>377293404

Because it's really freaky to think about and even Einstein talked about it and said it was scary and he wasn't comfortable exploring it.

>>377293550
As I understand it would take an impossibly large amount of energy to keep a portal open for more than an instant.
Take this with a grain of salt because it's just something I saw on youtube a few years ago.

>>377293918
The cube does not move, it has NO velocity.

Space that Portal wraps it around DOES. But there is no acceleration transfer happens to cube.

>>377288531
The cube would just slide down the ramp, not shoot as if it gained momentum from the portal moving.

Imagine somebody punching at the portal, the fist and arm would exit quickly from the other portal and then stop, the person wouldn't be shot out of the other portal because it's not in motion.

>>377293989

That's why I put the word "moving" in quotations.

>>377288531
The cube would most likely just slide off of the platform. Here's my reasoning:-

The orange portal comes down on it but the cube isn't moving. It would be like floating in a pool and somebody passing a hoop over you; you aren't moving so you don't start moving. Thus, the cube comes out of the blue portal but is immediately subject to the change in direction of gravity meaning it could possibly slide down the stop.

>>377294031
No, you're not taking on the force of the platform if you're not touching it.
The rim of the portal hits the platform and the force is transferred through the platform to the cube.

File: Afags_on_their_way_to_work.png (23KB, 1800x420px) Image search: [Google]

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>this is what afags believe

>>377294134
You're not thinking with portals faggot

>>377294031
B interpretation: In this case, the person would feel a tug in their hand from the momentum given by the moving portals.

>>377294182
You're certainly thinking with dicks though you flaming homo.

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>>377293562

>>377293918
>when the blue portal stops.
The blue portal never started.

>>377288531
>2017 and Bfags still exist

>>377294285

The blue portal is the one on the piston. It's moving. Technically the orange is moving with it as the points in space are bound.

>>377294092
Stop with the hoop analogy, it makes you sound retarded.

File: CuX_vEUWcAAEaJb.jpg (101KB, 768x1024px) Image search: [Google]

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>velocity appears out of nowhere

How to spot bfag and college-dropout - The Guide

Cut a hole in a piece of paper

swipe that hole over some object like that cube

does it shoot away?

>single atom of cube passes through portal
>single atom stops any form of movement as the rest of the cube is compressed into it
>end up with a black hole from the sheer density of the compressed cube

>>377294423
nature is disgusting

>>377294134
no they arent stop shitposting

Theory of relativity has nothing to do with current puzzle

>A moves at 40mph to envelope B and is ejected at C which is moving at 40mph for a net change of 0
This is a door

>A moves at 40mph to envelope B and is ejected at Cwhich is moving at 0mph for a net change of 40
This is a non existent portal anons are sperging about.

The numbers must be equal not counting gravity and wind resistance.

>>377294423
It baffles me how anyone can think it is B, for fucks sake.

>>377294269
Isn't this the same as the hula hoop analogy?
>>377294392
My mistake, I thought it was the other way around.

>>377294431
wtf I just accelerated my stationary pen with 99999999999m/h

Aren't both platforms moving towards each other?
Nothing is perfectly stationary.
When you fall to earth earth falls to you too.
Earth has more mass so it does more pulling but the effect is still there.

>>377294523
Sure, but if the platform with the cube on it is moving then the slant with the orange portal on it is also moving. Afags will say the speed of the cube with respect to the orange portal shouldn't change, while Bfags say it should change, just like before.

>>377291993
An object in motions will stay in motion unless a force acts upon it.

>>377293868
I take it what you are trying to say is that the cube comes out in a bubble in space where everything moves around it rather than the cube moving through space. That bubble eventually pops into the normal space. I still have two problems with this. First, I would expect that bubble to start collapsing the moment any part of it passes through the portal. This means the cube would be entering into the second rooms space on top of itself, which would either cause the game to crash or create a compressive stress on the cube leading to scenario B. The second problem is under the assumption that to bubble does not quickly collapse as the cube enters the portal. Under this assumption, wouldn't the ground not actually be able to stop the cube? The space and matter where the ground is would be able to warp around the cube rather than interacting with it. If the orange portal stops and closes at an inappropriate place you could have the bubble popping and make the matter of the cube overlap with something else, which may also cause the game to crash.

File: portal cube meme.jpg (23KB, 655x369px) Image search: [Google]

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>>377294192
No, the portal is merely a connection between two points. You could remove the portals all together and make it a person on a skateboard on top of a platform with a wall hiding the person from view, and the platform would suddenly move quickly to the side. To observers it would appear as if the person on the skateboard is rapidly exiting the platform but in fact has no momentum, it's the platform that has. Back to the portals, it's the platform that's moving, the cube will exit quickly then stop. You could also think of the exit portal as the one moving and not the one on the platform.

>>377293218
If light bends with the spacetime, then the cube should be invisible on the other side, right? All the light on the orange side will just go around the cube, while all light reflected by the cube bends back to the portal.

The whole concept of moving something just by bending spacetime makes little sense, since location itself ist completely based on spacetime. If the cube doesn't move in spacetime, then however you bend ST, it shouldn't have any easily observable effects.

File: 1495099846617.png (19KB, 217x424px) Image search: [Google]

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what now?

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>>377294948
Is this a stationary starting point? Then the cube will probably take the following trajectory after gravity accelerates it.

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>>377295172
>>377294948
sorry i meant it as 2 views.

File: Does gravity go through portals.png (99KB, 1920x1080px) Image search: [Google]

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>>377295172
Do you think gravity can go through portals?
What about high and low pressure fronts?
Imagine you open a portal on top of a sky scraper and one at sea level.
Would it cause a high-low air flow?

>>377295246
we know that portals only transfer velocity (at least this is the only known fact from game) so I'm not sure how gravity will affect it in this case.

IF the cube positioned pefectly for Portal to cut it in the middle it either stays like that in the center or slightly bend right on top and down in bottom portal.

>>377295359
it depends if gravity is found out to be a quark or not

>>377294937
Conversation of momentum is violated, I'm guess there needs to be a force on the platform for momentum to stabilise, and thus what should happen is that the platform slows to conserve momentum.

Therefore, Anything going through a portal while the portal is moving and the portal'd object has no momentum undergoes acceleration and thus gives a force to the platform to a degree which would conserve momentum.

ie, platform will slow down and the object inside accelerates?

This also gives a scenario of things being sucked through portals in contact. presuming that there is a vector force field on the portal surface.

>>377295246
Still stationary?

Is that black line a floor? If so, the gravity from the upper half will drag the cube rightwards, until it hits the edge of the portal, at which point I have no idea what the fuck would happen. Seriously, that's more interesting than the whole A vs B stuff.

If it's not a floor, then the cube will drop out of the orange portal on a slightly rightward trajectory and fall on whatever is below the portal.

File: 1495104141501.png (24KB, 217x424px) Image search: [Google]

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>>377295246
The box would slowly slide across the platform and then stop when it reaches the edge of the portal.
The forces acting on the box are proportional to how much of the box is in each area. I don't think the gravity in the second area would be able to overcome enough of the gravity in the first area to cause the box to roll over the edge.

>>377295515
>if so, the gravity from the upper half will drag the cube rightwards
It wont though. Or, rather, it depends how much of a cube matter pops out from blue portal. If more then mass will be more and the gravity will have stronger effect on it therefore making it move.

But if mass is equal on boss side OR smaller on blue side it will be stationary

>>377295359
Standing next to a portal on a wall, with the other end facing downwards, does not seem to effect Chell at all in game. It's to be simplest to assume that gravity acts like portals don't exist.

Air pressure is particles, and thus will flow through the portal.

>>377295359
Pressure would definitely go though since it is nothing but particles bouncing around and air or any other mass can go through a portal.

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>>377295417
>>377295515
>>377295527
you sure about that?

>>377295706
>Air pressure is particles, and thus will flow through the portal.
Hmm, but what id the difference in pressure from one side of a room to another?
a little? or a lot?
I imagine the farther the distance between the portals the higher the barometric pressure difference potential.
Imagine the Delta P effect but with portals.
https://www.youtube.com/watch?v=AEtbFm_CjE0

>>377295863
Yes.

In the original pic we still have one gravity point - earth below.

>>377295664
It depends on the surface materials and the angle as well.

The sideways gravity is sinA*massUpper*g.
The friction is (massLower+cosA*massUpper)*g*u where u is the friction coefficient.

If the sideways gravity is larger than the friction, the cube moves. If the friction is larger, the cube doesn't move.

>>377295863
see
>>377295664

Depends if positioned perfectly or the cube part peeking out of blue has more mass/matter transfered on the other side.

>>377295906
the same amount of gravity on each half is taking place
>>377295863
why would the gravity on the blue side overtake the gravity on the orange side?

>>377294886

The thing is that the space of the platform the orange portal is on is veing moved beneath the cube. Essentually picking it up from below.

You can see it because even though the ligh is bent, it moves along the grid as if nothing was bent.

Honestly, there's a reason portals aren't real.

File: A.png (822KB, 1707x1843px) Image search: [Google]

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>>377291856
the momentum completely stops as soon as the piston hits the ground.
i dont know why but putting a drawing on it makes it look really condescending sorry

>>377295895
This happens at the end of Portal 2.

>>377295895
This was pretty explicitly shown in portal 2:

https://youtu.be/usyYqJf0rfk?t=565

File: answer-to-portal.gif (57KB, 800x1080px) Image search: [Google]

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A FAGS BTFO.

>>377295895
>>377296416
So we basically back to "portal == hole or window"

Therefore A is correct answer.

File: a fags btfo.png (77KB, 636x424px) Image search: [Google]

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movement is relative

>>377296639
It's both. Just because it's a window doesn't mean physics doesn't apply to it.

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>>377296635
kek'd

So what happens if you slam the portal down on the cube but stop the platform once exactly half the cube is in the portal? Will it lift up and be thrown through?
Fucking Bfags

>>377296694
In this case it is clear B
Cube has velocity.
Portals preserve velocity.

I mean, we have the same scenario in Portal games in every puzzle...

>>377296712

It can't be both because SOMETHING is happening to that cube.

>>377296712
No, it isn't.
In the original example in OP - answer will be A

In order or it to be B - see post literally above yours. Cube needs velocity. applying velocity to window will not transfer velocity to cube unless make window frame to transfer it to cube but we know that's not the condition we have

>>377288531
why don't we just wait until we actually made portals possible?
should just take 250 more years

>>377296781

intelligent and handsome B friends understand that that edited image and the original are actually depicting the same scenario

>>377296382
>p = ma in a closed environment momentum is always conserved

But this is not true with portals. Just by having them face the same direction, if an object moves through the portals and changes direction, its momentum vector turns from v*m to -v*m, causing a net change in momentum of -2vm.

Unless you're assuming the surface the portal is on experiences the opposite change of momentum. But you can explain any momentum change away with this principle, so it leads to no new predictions.

>>377296639
>So we basically back to "portal == hole or window"

I don't think anyone is debating this. It is the obvious basic definition of a portal and doesn't do anything to resolve the problem. Stationary objects don't move though stationary windows, so it isn't A. Windows don't apply a force to an object, so it isn't B.

>>377296897

We have wormholes.

Really, portals can't exist outside of space because you can't fold spacetime into a physical object because it de-stabalizes the space curviture and closes the hole.

>>377296034
Cause one is closer to the centre of mass of earth silly.

>its this thread again
portals aren't real *rolls eyes*

>>377296721

>>377291517

>>377296942

Honestly the most logical result is that the portal couldn't let the cube pass while the cube is motionless and should just stop when it hits it.

>>377296968
Wormholes have never been observed. Also, portals are 2d holes, while wormholes would be 3d.

>>377296942
That's not how it works.
You don't need force here, we have gravity

That's why it is A. The cube still falls down because affected by gravity on the other side more than on the starting side due to bigger mass.

>>377291436

>>377291572
Answer this fucking question before this thread continues.

>>377297089

>Wormholes have never been observed

There's some exciting new stuff out there for you to read when you have the time.

They've finally been observed but only for a split microsecond. Black/dark matter has finally been officially seen as well.

Science is getting spooky.

>>377296926
p=mv* that was a typo
yup that is true, but what i was trying to explain there is that the momentum from the moving portal piston does not immediately translate into the cube, rather than into the ground. as the guy i replied to implies that somehow the momentum suddenly gets translated into the cube magically. because the cube is always at 0. even if you flip the cube velocity, -0mv^-1 is still 0mv^1

>>377291572

No one is pulling the cube, though. Things are just moving around the cube.

Also it really depends how heavy that rope is and how much force you put onto the pull.

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Either the box moves through the portal at 0m/s or it's B.

>>377296382
You seriously expect me to read all that?
I don't think it was condescending, at least you can back up your argument.
I was convinced of A before you posted anyway.

>>377297393
wow ur dumb
orange portal going through cube accelerated it at 10000km/h dumb retard!

>not knowing he can go light-speed instantly from stationary posiiton without any external or internal force

learn physics!

>>377297395

The box moves at 0m/s.

Space folds at the speed of the blue portal and moves to the other side of the cube.

Portalsnare representations of a point in space.

>>377297395

The box isn't moving here. It's the portal moving and shapeshifting time and space. It's just SCIENCE.

>>377297523
>>377297549
sounds like horseshit desu

>>377297025
As I've always said, the cube would be crushed.

>>377297301
The standard B interpretation does not say that the momentum of the piston is transferred to the cube. It says that the cube gains momentum just from travelling through portals that move with respect to each other.

The piston could be made of foam or tungsten, and the cube would be launched at the exact same speed of V_blue - V_cube. The momentum in the piston doesn't matter.

>>377297604

Portals are horseshit

>>377297604

You're going to love theoretical science in university. Just wait until you have to learn quantum.

>>377297025
Why?

>>377291372
It has to move in order to come out of the exit side you fucking dolt.

how autistic b fags get is pretty funny, its really a though, because the cube isn't moving

>>377297025
This is the right answer, it also happens ingame. It acts just like it was a normal piston without the portal on it. Portals cannot move through objects because they aren't hula hoops that you can just wave around freely.

>>377291372
> If it entered through a portal moving 10km/s, while being tossed into the portal at 10km/s, it would rematerialize at 20km/s
but this goes against what you just said

>>377297731

Because a moving portal is pulling a section of space behind it. When it hits the cube, part of that cube now exists in that space being pulled by the portal. That part of the cube is now being pushed into thr rest of the cube that hasn't hit the portal causing resistance between those points in space. The cube is technically being pushed into the podium it sits on by it's upper layer.

>>377297643
of course the material of the piston does not matter, but how does the cube generate force to launch itself? Before the portal moves through the cube, it's at 0 velocity and since all variables except direction (which is flipped) why does the cube suddenly burst in speed?

>>377297936
Portal magic, generally speaking. Same BS that makes stationary portals cause net changes in momentum due to direction changes. I don't think there's a satisfactory answer to this.

Why do people keep falling for these repeated troll threads. The OP does the same thing every time.

>>377288749
>>377288625

That's retarded. You're retarded. Physics does not work that way. Stop trying to explain things that you clearly don't understand, you retard.

I've always seen it this way : if the entrance and exit to a set of portals are travelling at different velocities, anything traveling through the portals must experience a change in velocity equal to the difference between the portals.
It's demonstrated very clearly in that one rocket webm, if anyone has that please post it.

>>377297897
It rematerializes at 20 m/s, but slows down to 10 m/s when it's completely through.

My instinct is that the cube will have no speed, leaving the portal, and will just fall on the next side because of gravity.

I'm not a physicist though.

>>377297886
The cube can still pass through the portal because the normal force from the ground/gravity is pushing it. If it was floating in space, then it wouldn't pass.
>>377297025
Thats probably because the devs said fuck it in regard to moving portals because it got complicated, if they probably worked on it more then yes.

>>377298019

Portals just change the face of the transform and keep the vectors in relation to the transforms facing, though.

>>377297929
I see, that does make sense, yes.

I would not say it is correct answer but I see logic

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>>377298053
>Why do people keep falling for these repeated troll threads. The OP does the same thing every time.

>>377297395
This desu

In order for A to happen the box needs to instantaneously transport, there can't be a "midway" or else the box needs to instantaneously decelerate.

But you can clearly pick up a portal and stick if midway through a portal, so B.

>>377298019
oh i can see why people believe in B, that explains alot

>>377298175

The box doesn't have to decelerate, though. It's the room coming towards the box that decelerates.

>>377298157

Yeah it's hard to say how it should react from there. Personally I think the portal should de-stabalize and close but if it HAS to go through then given that the cube is being pushed into the podium the entire time then it would be A.

GUYS

THE CUBE DOESN'T

GUYS

GUYS LISTEN

THE CUBE DOESN'T 'START' MOVING

THE PORTALS CAUSE

GUYS

THE PORTALS CAUSE SPACE TO BE MOVING TOWARDS THE PORTAL QUICKLY

THE CUBE IS SIMPLY SHOVED INTO A SPACE MOVING FAST AROUND IT, NOT IT MOVING

BUT THAT MEANS THAT THE BOX IS MOVING AT SPEED RELATIVE TO THE SPACE'S SPEED AROUND IT

THEREFORE

IT'S

B

>>377298108
> but slows down to 10 m/s
but y tho

>>377298423

Space curviture exists outside the effects of relative velocity. The box doesn't move.

Have none of you ever actually read the theory in full along with the cited research materials?

What has education come to?

>>377291372

Actually the box would travel at a rate of 20m/s but would only have the speed of 10m/s. The other 10m/s is the direction of space going towards it, and the moment the space stops moving the box is going to resume traveling at 10m/s.

>>377298423
How does space start moving?
Does space have momentum?

>>377298560

Because it was never actually moving at 20m/s. It was moving towards something that was moving at it at equal speed so the relative speed was doubled. Once one of the objects in the relationship changes speed the relative speed is modified. That's why in the original scenario the cube loses all momentum when the blue portal stops moving behind it.

>>377298790

Space is flexible. It lacks momentum because it has no physical body, but you could say it has speedd of travel.

There's a reason this shit isn't a popular field.

I love /sci/ /v/.

i was convinced of B when someone posted that variation where the platform is thinner and the orange portal keeps moving down it.

>speedy thing goes in, speedy thing goes out
>not speedy thing goes in, not speedy thing goes out
its really this simple, its A

Imagine you're on a pillar and the portal descends on you, stopping a bit below the pillar. Will you get thrown in the air?
If not, then imagine the pillar is a mile tall and the portal stops after that mile. Would you still not get thrown in the air on the account of space 'warping' around you even that far from the portal?

>>377299168
>not speedy thing goes in a reverse speedy thing, gains speed equal to the reverse speed of the reverse speedy thing its going thorough, speedy thing goes out
fixed

>>377289106
Yeah a little bit not launch in the air

>>377299168
>not speedy
You are aware of what speed is right? The absolute value of velocity which is the change in distance between two reference points over time.

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What happens when the portal doesn't stop?

>>377299464
yeah sure because this is a completely sciencey post with science and facts

>>377299512
b

>>377288531
>take cardboard tube
>SLAM it down on top of a small cube
>cube doesn't come flying out the other end, doesn't even move

how the fuck is a portal any different

>>377299631
You heard it here first.
B is the correct answer. The box flies out of the portal.

Alright, imagine this. You stick your head through a portal. Make sure you're not touching the portal, just stick your head through. Now the portal is going to move. What happens?

I bet 99% of you will say your head moves with the portal. Maybe a couple of hardliners will say your head "stays in the same place" because it lacks momentum. But there's a problem with that. See, if your head moves with the portal, that means that it's also staying in one place - relative to the portal, and also relative to your body on the other side of the portal. Conversely, if your head "stays in the same place," then actually, it is moving relative to the portal - and also your body. Meaning you'd get decapitated by the movement of the portal.

This shows two things. 1. Portals exert forces on the things that pass through them even without touching them, any way you slice it. 2. Portals create two frames of reference in which something can be moving and not moving at the same time, any way you slice it.

>>377299709
entrance and exit of the portals are travelling at different speeds

>>377296694
ok wtf i'm legit a bfag now.

>>377299820
doesn't matter

imagine a tube that extends from your hand to the ground, the cube is on the ground, cube does not move despite entrance and exit of the tube are travelling at different speeds

>>377299512
so cube is in -gravity retard?

>>377297260
>Black/dark matter has finally been officially seen as well
how, where

>>377300145
It's in space.

Nothing there moves through space excluding the piston. It's the space itself that bends and moves.

>>377300316
>a simple box moves
>fucking space itself moves

Boxes are easy to move. I don't even know how you expect to move space.

>>377299778
i can 100% prove that the head would move with the portal is we consider the portal games canon.
the portal games take place on earth (and a bit on the moon) both of those are moving, the earth especially rotates fully every day.
meanwhile you can stand half in a portal all day and see no effect of the rotation of earth.

>>377300448
That's what portals do though, they're wormholes.

>>377300245
>>377299512

Then it will be variation of A where cube just floats and/otp reserves its velocity and movement upon leaving orange portal.

If it was in 0-gravity but with air and not vacuum it would be spinning because that properlling blue portal and the mount it is placed upon would move air mass and affect floating cube.

Still no acceleration transfered to cube itself.

>>377300448
>I don't even know how you expect to move space.
With portals obviously.

>>377300203
>paying any attention to michio kaku spouting unsourced nonsense

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>>377300547
And now you're making things up.
Do you even know what a wormhole is?

>>377300695
Do you anon?

>>377300765
Of course I do. I just posted a picture of some wormholes.

>>377300472
Right, yeah, I was also pretty confident the head would move, which is consistent with B. But my real point was that the alternative answer, consistent with A, that has the portal decapitate you, doesn't actually address the common criticisms against B. It still requires the portal to exert force and it still requires something to move even when it's not moving.

>>377300887
O-
oh.
Didn't notice that, I guess I got as they say, rekt.

>>377300117
>cube does not move despite entrance and exit of the tube are travelling at different speeds
But that's not true in your example or any example that doesn't involve portals for that matter.

>>377300915
>which is consistent with B
how?

>>377300887
>>377300937
thats wood. wormholes don't exist, and are comepletely made up
i hate both of you

Portals don't "move" relative to one another, they are literally on the same spot back to back. They just bend space around them to make it look like they do.

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>>377301125
>wormholes don't exist
That's bullshit and you know it.

>>377301079
Because it means relative speed matters rather than some untenable notion of absolute speed that doesn't exist in a world of double frames of reference.

The only time the cube can have any momentum is when it's no longer on the original side to any measure. At that time, there is no longer any energy from the movement of the portal, and as such, the cube has no momentum related to the movement of the portal. Bfags are forgetting that the original side has an effect on the cube too.

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>>377301461
interesting but i think this is outside the scope of A or B.

>>377301662
>not version /d/
You had one job.

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It's close to A.

Just look at it in a continuous way. I don't get where the B idea comes from, there is not one single time when there is any upwards acceleration being applied to the cube.

>>377301889
>cube moves up
>there's no upward acceleration

>>377301889
They basically think that the force of the moving portal transfers to the cube when it passes through it.

>>377301981
Except the cube isn't moving upwards, it's remaining stationary while the portal moves around it simulating motion.

>>377302064
Take any point of the cube and graph its position over time. Yeah, that's called movement.

>>377301889
I agree with A but there is a common misconception. It's not about anything being applied to the cube. It's about the fact that the cube is physically moving upward relative to the blue portal.

>>377302139
You do realise doing that would not show any movement from the cube right.
Once again, the cube is stationary there is no force or momentum being applied to it propelling it upwards

>>377301662
I think it actually applies very well to A or B but I'm afraid it takes a lot of words to explain.

Long story short, I think both frames of reference exist side by side and are true at the same time, but one is a bit more true than the other. It's not like true and false, but more actual and potential, or active and passive. The potential frame of reference is what it looks like looking through the portal from the other side, but it is actualised by coming through the portal.

>>377302267
cube moves up relative to the orange portal desu

>>377302154
>It's about the fact that the cube is physically moving upward relative to the blue portal.
and im physically moving the speed of light relative to light coming at me from my screen as i stare motionless at it.

>>377301981
>cube is stationary
>it doesn't move
>it has no momentum

best way to think of it is like this. just have 2 portals on a wall next to each other. You charge at the portal on the right and leap through it, you come leaping out the second portal.

if you are stationary, you arent moving through the portal, but imagine a similar setup where theres 2 portals on a wall, this time the wall moves forward 1 metre, then backward 1 metre. You're already half way in the portal, so when the wall moves forwards, is half your body going to get shot across the room? no.

>>377302267
Draw a coordinate system such that the cube is not moving.

>>377302369
Light behaves funny anyway in relativistic ways so let's leave that out of it.

>>377302369
No need to try and convince me. I already understand that space is moving around the cube.

Objects maintain their momentum when travelling through portals.

A stationary object has no momentum.

Why the fuck is this STILL an argument?

>>377302431
If the portal moves quick enough, yes, you will be propelled.

pannenkoek could answer this definitively once and for all.

>>377302612
You won't. At most you would feel the vibrations of the two surfaces clashing but that's not enough to propulsion.
Where does this propelling motion come from?

>>377300970
im tallking about a telescopic tube, with an end that stays in your hand and one end that will fall down from your hand to the ground

theres no difference between that and the portal

>>377302659
I don't know if SM64 can simulate this.

>>377302705
Yes there is, because in your example the cube is obviously not coming out the end.

>>377297549
>The box isn't moving
You just sound plain stupid now.
Everything in the universe is moving dimwit.

>>377302704
From part of your body moving through space when the portal moves.

>>377302705
holy shit you're retarded

>>377302886
yes because there is a distance between the end, but the portal is the same only the distance between two ends is zero

>>377302909
>From part of your body moving through space when the portal moves.
You're completely stationary. The portal is moving around you.

File: 1494853326596.jpg (26KB, 315x365px) Image search: [Google]

26KB, 315x365px

>>377302937
you can't be serious

>>377298325
Where does all the force go though?

>>377302332
Nobody understands what I'm talking about here, do they?

>>377302984
lol so you run out of arguments? guess i win

>>377302978

Same as >>377302437, draw or define a coordinate system such that the person is not moving.

>>377303010
sure thing retardo

>>377303076
yeah you really debunked me there

>>377302989
Outward.

>>377288531
The cube has no momentun of itself and no force is being exerted on the cube except gravity, so when it pops through the portal it just slides down and falls to the ground.

>>377302937
Is distance of zero is no distance.

The only reason your tube example works is because there is a distance and that distance keeps increasing as the tube extends, which is what extending means. The portals, however, maintain their zero distance relative to each other.

>>377288531
>not understanding the portals: the thread

Portals break if the surface they're on moves. This might be a game play specific mechanic or not

How can people think that the block is going to propel itself without anything pushing it towards the portal?
It's not like you'll fly 50 feet into the air if something circular falls around you, there's nothing to transfer that energy and force to you.

Okay Afags, imagine you're standing right outside the blue portal (or whatever portal the cube would be coming out of in any of these diagrams)

So you're saying if you looked in the portal and saw a cube flying at you at x/kmps you'd just stand there, confident it wouldn't fly the fuck out and hit you as soon as the portals met?

>>377303630
Elaborate. Why would it fly at you?

File: thinkingwithportals.jpg (115KB, 800x640px) Image search: [Google]

115KB, 800x640px

>this thread again

>>377303596
Burger education. This board consists mainly of Americlaps.

>>377303713
The way I see it, if you're watching this event happen, you'd see the cube emerge from the portal at the same speed the platform was moving toward it at.

I'm not going to pretend I understand how theoretical portals in a video games work, but if it does in fact emerge at that speed, and there's nothing to remove the speed the cube obtained, it's obviously more likely to keep traveling.

>>377303596
How difficult is it to understand that the object passing through a moving portal IS moving? asdahfgadsfa

By the very definition of movement in our spacetime the object is effectively moving, and the fact that it is moving at some speed and it has mass is enough to define momentum by the very definition of momentum. You don't need to look for a cause, it is there, by its own definition. Portals break enough rules already.

>>377303630
It wouldn't. The cube is stationary, the only thing that moves is the portal. As the portal moves over the cube the dimension you're in falls over the cube, instead of the cube shooting into your dimension.

>>377303596
Portals themselves transfer energy, it should be obvious if you think about it.

>>377303978
Your dimension isn't moving, though. Being that it's the same dimension as both portals are in.

You're looking at it from the perspective of the entry portal but that perspective is only valid as long as the cube hasn't actually entered the portal yet.

>>377303908
>you'd see the cube emerge from the portal at the same speed
You'd see the cube enter and exit the portal but the cube isn't the object that's moving, the portal is. Unless the energy from the moving portal can be transferred into the cube to create an upward force there's nothing propelling the cube.

>>377304101
Right, and the other dimension isn't moving either, therefore no kinetic energy is exerted onto the cube as it enters the other dimension.

>>377304308
>the other dimension isn't moving either
But it also is seeing how it's being moved towards the cube.

Similarly the cube is also both moving and not moving.

File: hot and cold.png (81KB, 636x424px) Image search: [Google]

81KB, 636x424px

Is this what should happen?

>>377304303
If there was just a portal and no platform propelling it downwards, I might think you're correct.

But if the cube moves through the portal at all, is energy not transferred? I could see some sort of dimensional friction slowing the cube, so the outcome wouldn't be so dramatic as the one presented in B. As far as I know, energy is created when the platforms meet, and since the cube is the only free object, there's no where else for that force to go.

>>377304554
The only thing that's moving is the portal, everything else is at rest.

>>377304739
The portal is also moving and not moving.

>>377304739
The platform holding the portal has a lot of mass.

>>377304706
There would be a slight hop at the most from the resulting impact but not enough to actually propel the cube anywhere.
Unless it was made out of paper in which case both the impact and the air being forced through the portal would carry it like a bird.

>>377304678
The cold air would get sucked down into the blue portal and out the orange, if you wanted the hot air to continually rise up you would have to move the orange portable to the opposite side of the room of the blue portal's current position.