>B-fags actually believe the cube magically gains momentum

>>376981709
OMG I LOVE PORTAL LOL SO RANDUMB IM A GIRL BTW

>>376981709
B is correct using real life physics

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Hula hoops or high school physics?

The cube enters blue at speed, so it has to exit orange with it.

It's about relativity.

>>376981892
You forgot xD

>>376981709
Potential energy motherfucker. And this scenario does not deal with one system. Understanding frames of relativity is essential in discussing this.

>>376981709
I don't give a shit, just give me the cake already

>>376982026
sh*t ur right xD lmao lulzzz <3

portal is the second game that got meme'd into 'being good' first was half life

>>376982116
Better. Now I can feel the cancer.

>>376982004
But it's not entering the portal, the portal is going around it.

>>376982174
i also forgot to say "the cake is a LIE" and *holds up spork*

The answer is that there is no answer! The fact that this interaction no matter the outcome would break several laws of thermodynamics is one of the reasons Portal style portals simply can't work as a possibility.

>>376982307
Fuck. Now we're entering prime shitposting.

>A-fags can't argue this without resorting to hoola-hoops

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>>376982064
>>376982004
>>376981987
>>376981985
ITT: Retards

>>376982243
Its the exact same thing. The environment passing/engulfing an object looks the same as a object passing through the environment. The appearance of it depends on what the camera is tracking.

>>376982430
No it isn't.

Me jumping through a hoola hoop and a hoola hoop being dropped on top of me are two entirely different things.

Question is irrelevant anyway, portals can't be accelerated.

Would this be similar to the paradox with the bug and the rivet going almost at the speed of light?

From the frame of reference of the bug, it would be fine.

From the frame of reference of the rivet, it's fucked.

If I put a camera in a cardboard box and left the side opposite of the camera open, and then proceeded to drop that open side down onto a ball, the ball will end up inside the box with no momentum. In the OP problem, the box does move within reference to those on the other side of the portal, but that is because they are moving toward the box, not the other way around. The answer is A.

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>>376981709
Remember that A will always be correct

>>376982326
The piston moving blue portal is adding energy to the system making it valid in terms of thermodynamics.

B is the correct one due to the cube gaining velocity relative to the portal itself.

>>376982525
Technically they could be if they would be real.

>>376982567
Pretty much. I think...

>>376982616
Go fuck yourself

The real answer is that the question is incoherent in terms of modern beliefs about physics. The lesson of relativity is that there are no absolute reference frames, which is to say, all reference frames are equally valid. The Portal problem creates two incompatible reference frames, so either the situation can't happen or one of the most basic principles of classical physics is drastically wrong.

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What happens if the blue portal stops moving when it's halfway over the box?

>>376982681
>Technically they could be if they would be real.
They literally can't be real.

>>376981709
its all a matter of perspective
for afags, the portal and the exit room are the objects moving
for bfags, the portal and the entry room are the objects moving
however a portal is like a hulahoop, there is no arguing that

>>376982378
>A-fags can't argue this without resorting to easy to comprehend and valid arguments

>>376982798
See
>>376982396

>>376982525
>portals can't be accelerated.
Says who?

>>376981709
The fucking portals are already magic either way, so actually the real answer is neither is possible.

>>376982496
Exactly, dumbass. The scenario we are discussing combines both at the same time. How can a hula overlap you on one end and also not move on the other.

>>376982812
But IF they could that's how it would probably work.

This is the same as quantum physicists doing theories. They guess with their own line of thinking.

>>376982525
Portals need to be able to move, since the earth is constantly moving.

This isn't video games.

>>376982885
Game mechanics, people in universe
>>376982681
If we're talking about Portal portals, we have to go by the established rules.

>>376982525
What about the part in Portal 2 where you have to use a portal on the moving platform to cut the tubes with lasers?

>>376982880
The box loses its arm? How horrible

We have 2 conflicting frames of reference which results in our frame of reference (Earth) not getting a result we can achieve.

Result C: No one knows until we fuck with physics and get with portals.

Alternative answer D: Source Engine does not allow for moving portals unless scripted to do so.

>>376982396
That image doesn't make sense with portals. It connects two places in time. It is not a matter transporter like star trek. Just because a portal stops doesn't mean it cuts you.

>>376983061
That bends the rules, but the platform doesn't change speed.
>>376982949
Acceleration =/= velocity.

>>376983069
In terms of the box problem, half of the box would be separated. At least if you're a B fag. B fags will defend this

>>376983087
Well, or the Source Engine (or the Portal extensions) will do one scenario or the other based on minutiae of the implementation.

>>376983153
brainlet lmao

Think of what b-tards are arguing and apply that argument to that image.

>>376982496
But if the hoola hoop is dropping towards you at 32 ft/second, then looking up you will see it approaching you at that speed If you put out your arm it will hit you as if the two of you collided at it's speed, and if you swing your arm at it then it will collide at the combined speed of it falling and your arm swing speed.
This whole argument falls apart when you add in the fact that the hoola hoop is spatially connected to another hoola hoop, since that is impossible under conventional physics.

>>376983153
The idea is that the moving portal gives your arm enough speed to be ripped off by the sudden stop, it's arguing against B scenario

>>376983269
Cutting only happens if you close the portal. You can stand halfway between portals and be fine, you can do this in game. If the portal adds layers as you pass through it, it is no longer a portal, and more like a 3D printer. It would be a 3D printer that decontructs matter as it enters the input side and constructs it exact same way at the output side while measuring and applying the speed at which it first enters. This is NOT how portals work in the game.

>>376983614
See
>>376983397

imagine the orange portal being shown directly over the blue one when the pipe goes down. how would it possible fly upwards as the portal passes over it? it only moves at all because the orange portal is on a slope.

>>376982243
velocity is relative

A is trying to apply real-life physics to fictive scenario in a video game

B is realizing that video game physics don't match real-life physics and trying to solve the problem from video game's perspective

>>376983397
>>376983294
I understand that and I am applying the logic. If this image were true, any speed at which the portal moves and then stops would be enough to rip off the arm, which is false. You would feel a tug though, which I might add, is the same logic that is considered when applied to gravity and an object passing through two portals with different orientation. B still makes more sense then A.

>>376982396
This is interesting, it suggests the disagreement over the answer is related to different interpretations of the problem. Do we care about relative velocity, or about acceleration?

Suppose we conduct the problem in space, with the moving portal having a constant velocity as it passes over the cube. I think it would be clear B is the correct answer in such a scenario. This is because with no acceleration, there's no difference between the portal moving toward the cube and the cube moving toward the portal.

But now throw in acceleration, say the portal stops halfway across the cube. Now there is a difference: thrusting your hand through a door frame and then stopping isn't the same as having a door frame come over your arm and then abruptly stop. There's no wa to know what would happen - this just reflects the obvious fact that portals aren't real and are impossible as described in the problem.

Perhaps if portals could accelerate they have to accelerate together? That should resolve most of this nonsense.

First, move this into space so that we have easy inertial frames of reference. While it's easy to think that the box would gain momentum because to us it would appear to change place and thus have a velocity, it actually doesnt move at all.

Imagine instead of a portal, it become a long tube that you place over the cube. Inside the tube the cube appears to have momentum, but when the tube hits the platform the cube wont fly though it (assuming the platform has a large mass). Now expand the space inside the tube to include the entire universe, including the tube so that a loop, the portal, is formed. Or imagine the hula hoop whatever works for you

>>376984198
/thread

I think it's obvious to anyone with half a brain that scenario B would be the outcome. I mean if the portal is rushing down that quickly it will suck up air and create a wind tunnel, and when that cube comes out it will be sucked into said wind tunnel and go flying.

>>376984198
I have a feeling this is stealing my idea from the previous thread where I commented that moving hula-hoops into space turned them into tubes.

>>376984082
>gravity
There is sort of an interesting point here. If you put a portal on a wall at ground level and one on the ceiling, and walk through the portal on the wall, you only start falling when your centroid passes the plane of the portal. So apparently gravity is discontinuous at portals, and only applies to whole objects that are more than halfway through.
So, y'know.

>>376984283
I didn't see that thread but please, take all my reddit karma for the post if you want

>>376984393
I'll probably be fine. It was a quality post after all, you have my upboat friendo! ;-)

>>376984248
Okay, now do it in a vacuum

>>376984000

Nice trips f.a.m but I think you meant the exact other way

>>376984198
The tube analogy fails because the ends of the tube are forced to move together. The two portals are not. So it's possible to "impart" momentum to the cube.

>>376984341
Sweet! Yeah that's what I am getting at. Portals break the laws of physics so you can't really judge the scenarios based on Newtons laws and trying to balance things mechanically like force momentum and energy because we are dealing with more than one system. In fact, portals superimpose these systems while selectively transferring values between them and ignoring others like time. Then it becomes a argument of frames of relativity and how the portal actually works.

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ITT: people arguing about imaginary physics

>>376984726
all physics are imaginary

>>376984661
>the two ends have to move together thus you cannot create momentum
Alright, what?

>>376982362
*glomps you* x3

>>376984669
The best math and science shitposts are based on dramatically underspecifying the problem, since people are used to taking things for granted. So I guess keep that in mind whenever you see a post asking about flipping coins with odd restrictions.

It's fucking A. Nowhere in both scenario does the cube get the energy to pop out flying.

This is basically the blue and gold dress thing.

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The cube's position in the universe is displaced without the cube actually moving at all or having any force exerted on it. It simply "moves" to the new position and displaces the matter on the other side, which is air molecules.

>>376985103
If it doesn't have energy, how did it move to a different location? Don't you have to have a force act on you to move from one place to another if your starting velocity is 0?

>>376984941
I haven't the foggiest idea how you interpreted my post so I don't know how to respond to you.

>>376985251
It doesnt really change location though is the thing

>>376982378
we are dumbing it down for the b tards

>A-fags actually believe that motion is not relative to other objects

>>376985306
Basically you said
>if the two ends of the tube don't have to move together, then the cube gains momentum
which is just a very random claim to make and can be easily countered with making the tube a strechy tube of whatever stretchable material you desire

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This kills the Afag.

>>376984661

From the reference point of the cube-less side of the portal, the cube moves through the portal at a certain speed, but once it's through the portal it is moving against itself at the same speed from the reference point of the cube side of the portal. Ergo, the forces cancel out and the cube has no momentum. The answer is A.

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>>376985420
>B-fags actually believe that a portal is an "object" capable of imparting force to the cube instead of just a hole that the cube is passed through

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>>376983194
The Earth is constantly accelerating retard

>>376985251
The portal is moving the location itself, not the cube. It's kind of like the space ship from futurama moving the universe around itself.

>>376982396

I don't even know why this is up for argument. There are literally portal puzzles in both games where you have to time it so you get inside a moving portal and you don't magically shoot out the other side flying at fast speeds.

The game itself debunks this.

>it's another afags autistically talk about hila hoops while bfags attempt to use basic physics to prove afags wrong episode

>>376981709
AN object in motion tends to stay in motion, an object at rest tends to stay at rest.

|The object is the cube, and it has had no momentum placed into it, so it will be A.

>>376985517
This is actually retarded. The question in the OP deals with whether the cube gains momentum; the speed at which the cube appears to move (even though it doesnt actually move) through the portal is the same in both scenarios

You enter an object with a hole at 40 mph, and said object will continue to move 40 mph, what speed do you exit said object?
Afags: uh hulahoops hole hula hoops hole doors doorways door doorways thr answer is zero i dont know basic physics and im stupid so i need shitty analogies to even understand basic shit
Bfags: 40 mph.

>>376985661
/thread

>>376985812
And this is exactly the same thing, portals breaking momentum conservation

>>376985908
/thread

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>>376985908
Is this a "Post Bazinga in the thread or your mom dies in her sleep tonight" image?
:^)

>>376985481
Well, in the stretchy tube scenario, the cube doesn't gain momentum, but it does exit the tube with a different relative velocity then when it entered. Which is what actually matters for the original problem.

>>376985524
Then how is it possible to go through the non-cube side portal at all? If it can't move relative to it, how does it pass through?

>>376985748
If I move toward an object, it is moving closer to me from my reference point. This does not imply momentum on the object's part. In the diagram, the universe on the other side of the portal is moving toward the box, not the box toward the universe. When the piston slams into the pedestal and stops, that too stops the universe. Now, because the universe is stopped and the box was never moving, the box plops onto the floor.

>>376985517
>posts 9/11
>haha see the holocaust was a fake

>>376984726
https://en.wikipedia.org/wiki/Theoretical_physics

>>376985481
Actually on second thought, this raises a third possible solution. Sppose we go with the stretchy tube. The near end of the tube is coming toward the cube, but the far end isn't moving at all. The cube enters the tube (the 'space between' the portals) but never exits. So the cube is simply lost forever.

>>376986154
How can the universe move towards the box when it's already there?

>>376986191
>afags can't refute so they use shitty analogies
Oh hey look it happened yet again.

>>376986154
You don't understand the concept of relative speed, there is no real momentum or fake momentum. Besides portals break conservation of momentum

>>376986154
But from the opposite perspective, there's a universe that's stationary and a piston and box are flying toward it. When the piston stops, the box isn't attached so it flies off, like throwing a ball.
The point here isn't that A or B are right, but that both of them are wrong.

>>376986287
You can't expect logic from retards

>>376986415
Of course not, Afags just can't understand that momentum is relative.

>>376985661
I thought portals couldn't be on moving surfaces

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>>376985517
It would if they understood it

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>>376986470
So why isn't the box crushed under the tens of pounds of force of the air moving toward it?

Checkmate btards

>>376982118
Half life is good tho
Half life 2 is the shit one

>>376986685
They can in 2.

>>376981985
It's actually not though.

>>376986842
Because you're retarded.
Checkmate atard.

>>376985949
the cube isn't moving 40 mph tard

>>376987048
It's still travelling through the portal at 40 mph, retard.

>>376982118
It's a decent puzzle game with a great gimmick that anyone would enjoy

>>376986842
wat
why would the air not move freely between the portals
why would the cube not push the air out of the way as it went through the portal

>>376986470
The momentum of the cube dictates the speed at which the cube is revealed on the other side. Relative velocity is factored into A. B adds a completely fictional variable of kinetic energy on the cube from no-where, because A already accounts for them all.

>>376981709

The cube is being pushed by its own mass. It's B.

>>376987128
You're retarded.

Portals don't even exist in real life, so how can you even know which is correct?

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>>376987170
8
as in
checkm8 atheists
GOTTEM

>>376987229
>what is m-theory

wormholes are all but proven

Afags:hurr durr muh hulahoop doorway hole
Bfags: Analyzing the problem, we can assert that due to conservation of momentum and the fact that momentum is relative, the cube is entering the portal at the speed the portal is travelling to it, thus the cube must exit at the same speed it enters the portal.

>>376987170
1 leg

Okay b-tards, since the only thing you can stammer out is "m-muh reference points!" imagine this. You're standing at the top of a hula hoop 100 feet in the air. Underneath that hula hoop is is a box. When that hula hoop with you included falls down around that box, what happens? Exactly! Because the box was moving relative to your reference point, it will launch into the air!

>>376987328
>hurr durr hula hoops yum yum i love cock
Opinion and question disregarded.

>>376987328

the answers is niggers

>>376987170
4 real legs: 3 on the right and 1 on the left

>>376981987
the image with A just further proves it's B.

It's all about the RELATIVE portals. The hoop situation has both portals literally IN->OUT with their relative position staying the same. Move only one portal, and what goes in will be affected by the movement of the other.

>>376987328
>foodla hoop analogy

>>376987328

The problem with this is that in the portal scenario, one portal is moving and the other is still. In youra the huluhoop is entirely in motion. The cube is moving when it exits the orange portal.

When you go through a portal you would actually feel a pull relative to how fast you were entering the portal.

>>376987543
that doesnt matter
its all a frame of reference

>>376987297
Bfags: If I apply real life physics to a fantastical situation, I come up with an answer that does not follow the rules of either universe
Afags: The game itself says we're right

>>376987638
>developer flat out states that the game was not coded for the scenario in mind but if it was it would be B
Really makes you think.

>>376987734
>their own engine proves them wrong
it really does make you think

>>376987892
Only in the sense that an object in a video game intersecting with the ground, then violently vibrating before shooting off, constitutes inspiration for a space program.

>>376987892
>afags can't read
Truly does make you think.

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>>376981709
>>376981987
Neither. Portals CANNOT MOVE as per the game rules.
They are spacetime bridges and, as such, can not "move" because there's nothing TO move. You'd just shift the spacetime manifolds from one apparent location in 3 dimensions to another, which would be more like tearing the bridge across spacial dimensions while "mending" previous bridge points. A useless idea.

However, because portals are timespace bridges, we can say for certain that they do not imbue any kind of energy (potential, kinetic, etc) to their passengers any more than normal spacetime imbues objects in it with any additional energy. It just makes no sense. If you ignore the spacial distortion that would likely maul anything in the path or wake of a timespace bridge, there's no reason for such a bridge suddenly "arriving" at a location to contribute that arrival speed to objects in its path.

BECAUSE IT'S NOT ACTUALLY ARRIVING ANYWHERE. Portals are not discrete objects. A portal in motion, if it were permitted by the rules of the game, would not be a specific portal in motion, but more like a dense wave in timespace rippling along. The original bridge point reconciled itself and closed, and a new bridge point expanded probably a plank length away from it, and so on and so forth so long as the portal moves.

So there is no energy even in the portal's motion.momenta and inertial reference frames don't even matter.

>>376987638
A-fag arguments: 50% hulla-hoop, 50% physics principle they learnt in high school and cling to desperately
B-fag arguments: 10% advanced physics 90% having to explain how Portals aren't hulla-hoops and don't conserve momentum

>>376988319
But portals do conserve momentum, that's why it is B.

>>376988186
>portals don't imbue any kind of energy
but that's wrong
>put orange portal higher than blue portal
>walk into blue portal
>gain potential energy

>>376988319
>portals don't conserve momentum
>therefore it's the one where it flies out with newfound momentum

>>376985517
That's retarded, the speed of the rocket would be at the end of the portal the speed of the rocket minus the speed of the portal, and then regain the normal speed again

>>376988408
thats gravity not the portal
portal is just a doorway

Momentum is relative. Therefore it does not matter if the portal travels to the cube at 40 mph or if the cube travels at 40 mph to the portal, it only matters if the momentum between the cube and portal is 40 mph, and due to conservation of momentum, the cube must exit at the same speed it entered, which in this scenario is 40 mph, it cannot have randomly lost all momentum.

>>376982885
except for that one time.

>>376988643
where does the "new" energy come from if not the portals?

>>376982396
we are all agreeing that this WOULDNT happen, correct?

>>376988186
I can see the argument that you are trying to make but your use of buzzwords makes you sound like you have never attended a single physics class in your entire life.

>>376988672
Okay, if it doesn't matter which one is doing the moving, let's say it's all the matter on the other side of the portal that's moving toward the cube. The piston then slams into the pedestal, stopping everything on the other end of the portal from moving toward the cube. The cube was never moving, and now everything that was moving toward the cube is no longer moving. What now?

>>376988672

The cube does move at 40mph in bith scenarios. The only difference is that in A the cube stops when the portal stops and in B the cube continues when the portal stops.

I could see it going either depending on how the portal worked specifically.

I feel like there would be a large gust of air, but the scenario might be A. If the portal wasn't rooted on the ground but was floating, I would say B. The problem I have is that the portal itself stops, and that cube is still touching the baseboard.

>>376985661
perhaps the game isn't realistic? is that thought too crazy?

>>376988918
The fuck are you trying to say?

>>376988731
Gravity. Is a comet affected by a Planet's gravity ALL THE TIME or only within a certain distance? At what point does a comet hurtling through empty space become affected by the mass of a celestial body? Is it affected by the mass of all objects at all times? Are we?

There has to be a point where an object isn't affected and one where it is, even slightly.

>>376989103
you'd have to be outside of the galaxy by a few thousand light years to not be affected by the pull of something.

>>376988731
From the change in height.
Gravitational potential energy is mass*gravity*height.
Where do you see "portal" in there?
That's like claiming stairs give you potential energy because after you walk up them you have more potential energy than when you were standing at the bottom.

Walking through a portal that's lower than the one you exit provides gravitational potential energy like walking off a cliff might provide it. You cross a physical distance and your frame of reference changes.

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>>376989003
Perhaps you'll understand one day my non-white friend.

>>376988803
Half true. Engineering degree. So I've had a handful of "real" physics classes and everything else has been applied physics in the form of engineering classes. Only really touched on upper dimensional physics in a quantum class I took as an elective.

>>376989246
Not an argument.
Perhaps one day you'll be right and/or white, but today is not that day.

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>>376989103
>Is it affected by the mass of all objects at all times? Are we?

Yes. Gravity has no maximum range - every object in the universe is applying a force on you, even if the force is infinitesimally small.

>>376988365
No, objects passing through portals conserve momentum. Portals themselves cannot experience momentum, and thus cannot pass it on to any objects traveling through them.

>>376989352
Engineering undergraduate fag here, I like how to solve these questions you need to put your frame of reference infinitely away from the earth.

>>376989312
Not my fault you can't comprehend simple concepts. Re-read the thread, re-read your post, then re-read mine and you just might be able to understand the discussion. If you still are unable to grasp it, there is no more advice I can offer you.

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>>376989242
That's not the same thing at all retard, look at pic related. You're going to become faster and faster because you're gaining energy and that energy has to come from somewhere. It's less of a stretch to assume Portals are an energy source than to assume gravity is like this guy does >>376989103

>>376989358
The object on which the portal is on is experiencing momentum, and since the portal travels with said object, it is moving at the speed at which the object is travelling.

>>376989103
Technically, if you place two atoms at opposite ends of the known universe, with nothing else in between them, they are attracted by gravity and after a trillion, trillion, trillion years they'd collide at like .6 meters per second.

Even in a packed full universe, those two atoms pull on eachother exactly the same amount.

>>376989447
It's not my fault that you are unable to comprehend simple concepts and in your anger project your faults onto other people.

The real answer is it either stays at an angle between the orange portal or slides due to gravity.
Anything else is retard logic

>>376989469
>since the portal travels with said object
It does not.
Portals cannot be placed on moving objects.
And even if they could, what looks like a portal moving is, in fact, just a hole in space being re-positioned.
No mass so no potential energy.

That guy isn't making an assumption on gravity. It's a known fact.
Gravity has been well-described for... a few hundred years now.

>>376989358
No they don't, if you throw a ball into blue portal it's going to come back in your face through orange, meaning momentum has been multiplied by -1

>About to go to sleep
>See this thread
Do I explain to Afags why they're wrong yet again in great detail, or just assume it was done elsewhere ITT?

https://www.youtube.com/watch?v=JhrVBSsiIqk

>>376989660
Do the explanation.

>>376989476
what if the two objects where the same side of a magnet?

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>>376989645
forgot pic

>>376989660
Go ahead

Portals are like windowa you reddit try hard fucks
Smash a wundow frame down on a box, it just goes through
Speed in speed out slow in slow out
Frame of reference related rpseudointellectual garbage need not apply

>>376989463
If you assume portals are the energy source you run into an even bigger problem: Where is THEIR energy coming from? How are they doing this? You must explain not only why gravity ISN'T doing this, but also why and how portals are able to infinitely feed energy into objects passing through them.

And THEN you must explain why they would do so in precisely the way you claim. Sure, objects fall down, because of gravity. Why do they still fall when portals are energizing them? And how does a moving portal passing over an object apply a specific momentum to said object and not some alternative?

Portals are bullshit.

>>376981709
Neither. The blue portal would vanish as soon as the platform starts moving.

>>376989645
>Come back through your face
Why would you put a Portal on your face anon

Arent portals just fucking holes?
How is this even a qustion?

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>>376989645
From your frame of reference. From the ball's and possibly the portals', its momentum has been conserved.

Tell me: If a falling block pulls on a rope that passes through a pulley and yanks another block upwards, has the momentum of the first block been inverted?

Either way, you can depict the system as a straight rope with a block at either end or you can look at it from an individual block's perspective or you can use neither.

>>376989758
Yup.
>People actually try to apply logic to something that's literally impossible, even in the game's mechanics

>>376981709
>>376982396
>Not understanding high school level physics concepts
There is no difference between the cube being pushed up and the blue portal being pushed down. The only thing that matters is the velocity of the cube IN RELATION to the blue portal. It does not matter which one is moving in relation to the platform.
>>376989730
In a closed system with no outside influence, how can you tell if the window frame is moving or the box? hint: you can't, the only thing that matters is the relative velocity.

>>376989730
>>376989902
portals would be like windows if you could only move one side of the frame

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>>376981709
Case closed.

>>376989687
>>376989712
Don't think about it in linear terms. If the portal were just a window, Afags would have a case in that the cube technically never moves. If the portal moves around the cube, what does it matter to the cube regardless of the portal's momentum? It should stay stationary, right? So it should just plop harmlessly out of the second portal with no momentum except that which the slope adds.

The problem is that portals impose their own set of rules and physics on objects they interact with. The blue portal is coming down on the cube, and it's coming down fast. As the blue portal engulfs the cube it does so from the top down even though the speed at which it's happening could make you think the process is instantaneous. It's not, the cube is rapidly being engulfed by the blue portal, it is rapidly running out of space which it can occupy, and thus it MUST rapidly emerge out of the orange portal. In essence, the fact that the blue portal swallows up the cube so quickly means that the cube is forced out of the space by its own mass, it can't stay in that spot, it has to come out of the orange portal and it has to do so as quickly as the blue portal is coming down on it. Since it emerges incrementally and quickly, it can be said that the portals have actually transferred momentum to the cube which would result in the cube flying out. The answer is B.

>>376989997
no it isn't you fag

>>376990020
yeah it is you donut

>>376989934

The cube is being slammed against winds going at the same speed it is. The momentum is canceled out.

It bothers me that no one is taking the air in the room into account.

>>376989734
I don't have to explain shit, it just makes more sense to assume that the portal gun is able to do this than to assume gravity behaves differently in the portal universe. Where the portals get their energy from is just headcanon, you're free to pretend they suck the energy out of other dimensions

>>376989997
And here comes the "b-but that's wrong"

>>376989934
>Using scientific words to sound smart
You're wrong faggot

>>376981709
> A-fags literally don't understand relativity.

Woaaahhh....

>>376990153
dougnut brain

>>376989730
>Frame of reference related pseudointellectual garbage need not apply
are you retarded? velocity is a concept that only exists in relation to other objects, of course the frame of reference matters.

>>376990216
Except he's right, faggot.
>he used big words so he's wrong
>this is the intellect of an afag

>>376982681
Relative to the blue portal EVERYTHING else is moving towards it, not just the cube. So it would still just fall to the ground.

>>376989997

Do it with the character model and do one where the portal doesn't hit the ground but only covers half the cube.

>>376990221
Portal isnt moving dumbass it gets stopped the minute it hits the pedestal

>>376990198
sure, I'm taking the image at face value. there are tons of other factors that it doesn't account for
>>376990216
velocity is a big spooky word? i feel sorry for you

>>376990315

THIS.

Each room is essentially it's own object. The portal CAN be like a window, but if you're in a car and you run into a tree, a branch isn't going to suddenly shoot through the car at 55mph. The tree is simply coming at you with 55mph worth of force as a hole. When the tree stops "moving" so do all parts of said tree.

>>376987502
>: 3

>>376985517
This is fucking retarded. Unlike the rocket in the webm, the cube in OP's pic doesn't have a source of kinetic energy that lets it zip and come flying through the portal.

The speed of the portal is irrelevant because the portal isn't adding any kind of energy to the cube. It's not like it's fucking smacking the cube or anything.

>>376990595
>afags don't understand all momentum is relative
really makes you think

>>376982243
Have you ever heard about electromagnetic induction? Relative movement is all that matters

So I'm not completely convinced one way or another but assuming b scenario is correct wouldn't the box start lifting up before the blue portal slams down?

I imagine the first bit of cube matter would gain momentum as soon as it exits the orange portal and pulls the rest of the matter that still hasn't been slammed down on by the blue portal. And in this scenario wouldn't it go faster than the blue portals slamming because you now have the force of the cube pulling and the portal speed.

>>376990587
Oh snap someone caught me using smileys on 4chan, guess I'll go back to emulating Pokemon XD

>>376990198
Nobody takes into account the fact that the cube pushes against itself as it enters the other side of the portal either. The portal on the piston moving downward causes the part of the cube that moves through it to be moving back into itself upon reaching the other side.

So, I believe that what actually happens is that whatever goes through a moving portal is crushed by itself if it is not allowed to move backwards. In essence - the portal no longer does anything and you get crushed by a piston with a portal decal on it.

>>376990015
For the record, I've never had an Afag address this explanation before.

>>376990672
>XD
Kill yourself

>>376989997
>this shitty mod I made proves it!

>>376990668
Only if the portal is accelerating

>>376981709
>posting it again

if only we had a theoretical physicist on hand to work this out for us

>>376990691
Probably because it doesn't make sense

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>There are people ITT that genuinely think A is the correct scenario

>>376990760
How so?

>>376990742
Not an argument.

Should someone post this on /sci/ or will it be laughed out?

>>376990803
>/sci/
Sci is /v/ tier retarded. Don't even bother.

>samefag B fags spamming relative meme
We get it Einstein its your word of they day even if you don't understand the concept

>>376990691

It's addressed in this thread. The cube has 40mph winds hitting it keeping it in place.

>>376990760
Every single time an Afag fails to comprehend a simple explanation like that it drives me crazy. I feel legitimately sorry that you're mentally stunted, not even in an insulting way.

>>376990869
According to what metric? Wind friction doesn't just halt momentum like that, and the portal certainly doesn't just push wind down onto the cube.

>>376990868
>ur wrong but im not gonna tell u why ::::::^^^^^^^^^^^^^))))))))))

>>376990869
>The cube has 40mph winds hitting it keeping it in place.
>adding variables so you can scream about how right you are
there are no winds in the original image

>>376990863
True, I just looked over at their catalogue.

Jesus christ.

>>376990774
>it is rapidly running out of space which it can occupy
Because of that

>>376981709
It's neither since this is videogame physics.

Relativity doesn't just apply to the cube and the portals. It applies to the entire room, of which the portal creates a theoretical copy. You have the theotetical room slamming into the original room. More accurately, the room of the orange portal is falling onto the room of the blue portal. The cube isn't going to move.

If the cube was going to move, then any object going through a portal should instantly double in speed.

>>376991029
>Portal comes down fast
>Cube cannot occupy the same space as the blue portal
>Portal comes down fast, cube emerges fast from orange portal
>Therefore the cube gains momentum and is pushed forward by its own mass
Tell me what is hard to understand about this.

>>376990928
>>376990990

It's like sticking your hand out a car window or landing on a body of water.

It's physical resistance.

>>376991112

The cube is rooted to the platform. You can think of it as being pulled by itseld the entire time it's going through the portal.

>>376991129
you are adding things that don't exist in the original question. It's like saying that there is a giant vacuum pointing at the orange portal, therefore B is right

>>376991129
>It's like sticking your hand out a car window or landing on a body of water.
And yet you can still push your hand forward and landing in water, you will break the surface and go under. I guess catapults never existed because that gosh darn air resistance was too strong, right?

>>376991112
>Cube cannot occupy the same space as the blue portal
I already told you, that part

So basically in A you're assuming a portal is like a window, and in B the portal sends you through with the relative momentum you have to it?

So, for example, for B, if I was holding a box with my arms extended above me, and the portal came down fast just to the height in which it gets to the box, I would either get my arms chopped or fly to the other side from the box and my arms accelerating while I'm still holding it?

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If we are going by Portal rules, and if the portals are able to be placed on a moving surface, this would have a number of constraints.

As is, any momentum going into a portal is conserved upon exiting it. This is true for Chell, cubes, and other objects in the game. Speedy thing goes in, speedy thing go out. This is the only underlying principal here, so we can think of portals as a fixed entry point in spacetime. It doesn't exactly matter how fast or slow the portal is moving relative to the object, the object that passes through will pass through. In fact, if someone were to put the upper half of their body into a portal while the other portal was moving, they would stay put on the other end of the other portal as it continued to move.

The problem that /v/ seems to have is that several people believe the portals can have momentum, which is not true. A portal is simply a hole in space.. If you were standing on a pillar and someone dropped the opening of a large pipe onto you, would you change your position in space? And the answer is, no, even as the pipe would continue moving, you'd still be standing in the same spot.

All the portal does is that it takes your conserved movement (or non-movement) and displaces you like a teleporter would. You would still be standing the same way you were as the portal was dropped on top of you.

>>376991241

When you push your hand forward, you're adding more force to it than it had from the car. When you stick something out the window it feels like it's being pulled to the back of the car.

When you land in water, the fluid doesn't immediately move. It hits you. This is why people sometimes break limbs when they land in water.

>>376991057
And this is why I say the cube will crush itself. When it passes the threshold of being on the blue portal side into the orange portal side, those molecules are now pressing back down onto the cube at the same speed as the piston.

>>376991228
It's more accurate to say that from the orange portal's perspective, it'd look like a wall slamming it shut. The cube can't rest there any more so no matter how you look at it, that cube is moving and it's moving quickly.

>>376991253
You're beyond help. I'm sorry anon.

>>376989997
Afags BTFO

>>376991279

Your arms would be in a lot of pain or break dependinv on the speed.

According to the B theory, the box is pulled out of your hands.

>>376991279
I thought with B you're basically thinking of it like a window in a flying plane.

>>376991335
You acknowledge that the cube is moving and it has momentum. You would have to in order to reach this conclusion, but prove to me that the wind resistance of the air that is just sitting in the room is enough to completely halt such momentum. I stand by my catapult example, because you've not given me any reason to believe that wind resistance that strong just appears out of nowhere.

>>376982926
You don't have a fucking clue what you're talking about. The woo bullshit you read is metaphorical and is not actual quantum physics. Quantum mechanics is rigorously mathematical and you've never seen any in your entire life

>>376991318
Movement is relative. You are entering the large pipe at the same speed it is travelling.

>>376991352

I partially agree. It would largely depend on the material. A cardboard box should collapse, but a solid steel box should just give off a sound from vibration.

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I'm putting this thread to an overdrive

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>there are """""people""""" in this thread who can't grasp the concept of relativity

>>376991449

The catapult launches the ball into the air. The ball is slowed by the friction of the air. The catapult has to launch with enough energy to overcome the resistance of the still air.

With the portal scenario, air comes at the cube at the exact same velocity that the cube comes at the air.

This is like two cars coming head to head vs a car hitting a standing car. In this scenario.

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>>376991562
https://www.youtube.com/watch?v=bg41XfnIBvk
Easy explanation.

>>376991373
>You're beyond help. I'm sorry anon.
sorry anon, but it doesnt make sense, the portal doesn´t ocupate a space so i don´t know what you mean with
>Cube cannot occupy the same space as the blue portal

>>376991502
But the pipe is not enacting any effect on you at that given moment. A portal has no intrinsic property of affecting you outside of what you put into it. And if you are standing still, the pipe / portal does not somehow transfer that movement or speed relative to you. If you fall into a pit, does that mean the pit is traveling with you? No, it's fixed in space regardless of relativity. An object in motion stays in motion, but likewise, an object at rest stays in rest.

>>376991619

I think everyone understands it, but people don't know how to apply it. They're focusing entirely on the cube and two portals from one perspective and not taking the entire room into account.

>>376991619
>there are """""people""""" in this thread who think the math-free gibberish they spout has anything to do with physics just because they copied a word from physics

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>>376991562
>>376991683
Also this phenomenon was explained two decades before the dress was ever posted.

>>376991653
That is wrong because the air levels between where the cube is and where the orange portal exits are equalized. No movement is happening beyond the portals moving the cube from point A to B, the blue portal is not dropping additionally air pressure on the cube or creating wind resistance because this all happens in the same room and the air between the two portals has no discrepancy. Your theory would hold water if the cube were entering into a more pressurized room or something but even then you'd have to explain how a portal can act as an airlock like that.

>>376991562
>"phenomenon"
Just some retards who don't know how photography works

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>>376991562

>>376991753
>momentum is relative is considered math free gibberish by afags
You are a very special anon.
>>376991698
You exit the pipe at the same speed you entered it. B is essentially stating that because the cube entered at x speed, the cube must exit at x speed due to conservation of momentum and momentum being relative.

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>>376991753
>math free gibberish
>he thinks that physics or math concepts are only contained in equations
how's high school treating ya

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>>376991683
>that webm

Relativity with momentum means that if you're riding a bus with no windshield at 55mph that you're getting hit with 55mph winds and insects and whatever else is in the air. When the bus stops, so does all of that relative motion of the stuff that came into the bus.

Think a butterfly net. The butterfly enters the net at the speed you swing the net at, but if you stop the net after the butterfly entera the opening but before it hits the netting, the butterfly doesn't shoot into the back of the net to account for your loss of momentum.

>>376981709
This is retarded. Both are possible depending on how the portals work.

If the portal functions like a window where both ends will share the same velocity then A is correct. The orange portal will stop at the same time as the blue portal does and will have no relative velocity to the cube. This is what all the hoolahoop retards are getting at.

However, the image leads you to believe that the portals can move independently to eachother and interact with the objects to teleport them. In this case, B is correct because the cube will still have high velocity relative to the orange portal when it exits. The blue portal stopping has no bearing on this.
It's useless to argue any real life examples because a portal like this can never exist.

>>376991893
momentum is not "relative" to whatever random garbage you decide to make it relative to

you have to define an inertial reference frame, retards

>>376991840

The act of entering room creates relative pressure. The air has to leave the room to make room for the box, but there's no space behind the box. Meanwhile air is entering from the boxes end as well. That whole room should feel gusty from the displacement, but what really matters is the moment that piston stops moving.

If the box was floating in air, it would absolutely launch, but not at the full momentum of the portal because it has a gravitational pull and wind resistence with no addiotional energy being supplied to the cube like the piston had.

>>376989934
Don't bother anon, most people don't know what Special relativity is despite it being 112 freakin years old.

>>376992150

Fucking this.

The entire room is "moving". Not just the cube. The cube stops when the room stops.

>>376991683
I appreciate someone visually showed this with the use of a cute anime girl

In conclusion, Afags win again, this thread is now closed

>>376991864

>photography

>>376992461
>afag desperation

>>376992465
>overexposure
>not a photography

>>376989784
You can put them on moving objects in 2.

>>376990782
That is an argument though, by saying it's a mod it means it's not official and can't be used as evidence. It's like using photoshop as evidence.

>>376992596

Photography is just the act of capturing light. Color perception is seperate, it just also ties in. Photography doesn't affect how the brain perceives an image.

It's why almost no one still sees a hite dress in the image. We perceive it with a different preconception now after seeing it so many times.

Overexposure is just a factor, not the cause.

>>376981709

It is A.

The cube should only be in motion as long as the portal is. Once the portal stops, everything that went through it, assuming no new external factors have acted on them, would stop as well.

>>376981709

Gotta love this thread. OP clearly has no idea about the laws of physics, he just 'thinks' scenario A is correct (most likely due to being an idiot) and stubbornly refuses to listen to people who actually do know what they're talking about.

>>376993541

By the rules for B, any object going through a portal has to double in speed, but that's not how relative motion works.

>>376993807
>any object going through a portal has to double in speed
what?

>>376981709
>crtl f hoop
>24 matches
>around 10 % of the posts thinking portals are hoola hoops
Sad

>>376993931

In this B scenario a still cube moves with the momentum of the room charging towards it once it enters the room.

For this to apply, if a person threw a ball at a portal at 5mph then the ball now has a room coming at it at 5mph. This means once it crosses the portal the ball has to be moving at 10mph.

Or we can apply relativity to the entire scene from a point (the proper way to do it) and realize that the box is going to stop moving towards the orange portal the moment the blue portal stops and will lose all relative momentum.

>>376993541
reminder that momentum is not whatever shit come out of your mind anon

>>376994006

>didn't even read the posts and made up a statistic

>>376989463
Holy fuck you are retarded.

Imagine there are no portals for a second, and that he's just falling a long distance. Hurr, where is the energy coming from?

From fucking gravity, idiot. The portals are doing nothing to interact with that system other than removing a physical obstacle from stopping your fall, but that is different than literally imbuing you with energy.

>You're going to become faster and faster because you're gaining energy and that energy has to come from somewhere.
What is terminal velocity?

>But muh potential energy...
Not the object of discussion and also of dubious relevance even if it was. Portals do not add energy, they merely remove obstructions that interfere with the flow of energy, IE, space.

>>376994778
this, thread is over, Afags win

>>376995302
But B is right.

>>376982396
If the portal is moving fast enough to break the bonds between the atoms in his arm then this happens.

>>376995875

He'd have to hold an extremely heavy object for that to be true.

>>376995771
Fuck off, nigger

>>376987087
no it's not. The potal goes over the box at 40mph but the cube does not have momentum.

>>376995968
Well it completely depends on the speed of the portal. When I say fast I mean like 1000's of mph.

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>>376981709
>They are both right.

In scenario A, we clearly see a cube with a mass big enough to not get affected by the velocity of the portal.

In scenario B, the cube has a tiny amount of mass, so it receives the velocity of the portal.

If there was no cube, the orange portal would still push out air at the same speed the blue portal is moving.

>>376996109

Maybe, but I feel like his arm should just cancel itself off no matter what speed.

>>376996041
>>376987087
at least use meter per second

>>376990637
>box is at rest
>after the portal comes down upon it the box continues to stay at rest and slides down the ramp.

Sounds pretty fucking simple to me. At least understand how your own argument works

>>376996197
>push out air
>push out air
stop your triggering me t. a-fag

>>376996197

The air would actually feel like it's coming from the piston.

>>376981709
Autism man already decided it is B
https://www.youtube.com/watch?v=JhrVBSsiIqk&t=34s

>>376996041
In relation to the blue portal its going 40. The box isn't actually moving but it is getting closer to the blue portal at a rate of 40mph.

>>376981709
>the cube in A suddenly stops as though it hit a brick wall
>the cube in B keeps moving at some speed after exiting the portal, since it had to move at some speed -through- the portal
Huh. After seeing it animated I'm gonna have to switch to B.

I guess the relative motion of the portals breaks some conserved quantities. Not too surprising given that you can set up an infinite falling loop for infinite energy with just regular stationary portals, and momentum isn't conserved (speed is, though).

I suppose moving the portals means that speed and kinetic energy aren't conserved. Well, rip physics.

>>376996352

>says he'll talk about it for 2 minutes
>4 hour video
>part 1

>>376987170

As with every elephant: 12

2 in the front, 2 in the back, 2 right, 2 left and one in every corner.

>>376996275
The box is at rest till it exits the blue portal, in which it exits the blue portal at the same speed it was travelling towards it,

Even though the box itself wasn't travelling at any speed it was still getting closer and closer to the blue portal.

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>>376996330
I support scenario B.

Let's say that instead of a cube, you're standing on the platform with the orange portal moving toward you, let's say at 10 m/s.

The blue portal has moved through half of your body. That half of your body MUST be moving at 10 m/s out of the blue portal to make room for the rest of you. Otherwise you get squished between the portals. Now 99.9999% of your body has gone through, and the part that's passed through still MUST be moving at 10 m/s, to make room for the tiny portion of your body that hasn't passed through yet.

Now you're all the way through the portal. If you pick scenario A, you move through, and the 99.9999% of your body that was moving only an instant ago must just stop. What stops it? The only way to stop a body in motion is with a force acting on it opposite the motion. Where is this force coming from? Where does all the kinetic energy 99.9999% of your body just had go to?

>>376996558
fuck i meant the blue portal

>>376996558
>Put bullet face up on the floor.
>Throw corpse on bullet with speed of 1700mph.
>Bullet penetrates corpse and flies upwards.
This is you and every other retard in this thread.

>>376996412

I started at B, too. But the reality is that the block isn't moving. Everything is. Every single thing is moving, but the pistol the portal is on moves faster. That piston slams into the ground and stops. All of that added momentum ends when the piston hits the ground.

You can think about it by creating an instance of the room in your head attached to the blue portal. This new room is falling onto the cube. Once it finishes falling onto the cube, the cube is being pulled by two forces of gravity. The one from the first room, and the one from the second. It will slowly slide down the orange portal until it has broken free of the original gravity and then fall onto the ground in the orange side.

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>>376996687
:^)

>>376996517

You'll have to explain why the box would gain all that momentum and not say... a pen on the ground a few feet away from the portal.

Because that whole room is moving relative to the portal. The pen should in theory fly up as well.

>>376996756

I like it.

>>376981709
Momentum is a relative term meaning that the portal would see the cube as having the momentum and would impart that momentum onto the cube as it passes through. Portals are able to redirect momentum meaning that the cube's relative momentum would be communicated through the portal into whichever direction the exit portal is facing. This way of thinking would mean that answer B is correct.

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>Arguing about the physical properties of a fictional technology that defies all known laws of physics in the first place

So this is the power of autism

>>376996806

The cubes momentum is relative to the blue portal and piston. When those stop moving, so does the relative motion.

If the portal somehow kept going then yea the cube flies through the room as all of that space is shoved unto the room, but the portal STOPS so the cube does too.

>>376996673
That's just a rebranding of the shitty hoolahoop/door analogy that people have debunked 10000 times.

>>376996517
>in which it exits the blue portal at the same speed it was travelling towards it,

The box is never moving towards the portal. It's not reverse, it's never been reverse like that. Only the blue portal, on the piston is moving. Nothing else. There is no energy transfer.

This is why people use the hula hoop example. If you bring a the hula hoop down at 40 mph on top of something, that something doesn't gain the energy and go flying off.

Object at rest tends to stay at rest. The box is never moving, it sits there, the blue portal is moving. Portals do not give momentum they only remove the restriction of space. Hence the hula hoop example.

>>376996928

The hulahoop thing hasn't been debunked at all.

The reason it wouldn't bounce up if you through a huluhoop is the same reason it wouldn't bounce up if you threw a huluhoop at it, and that's because the huluhoop stops. Of it was floating in the air them sure it goes through the hoop at the speed of the hoop, but it loses mementum with the hoop as well. If the hoop stops then so does all movement relative to the hoop.

>>376996876
The portal works as a spacetime bridge. When it stops, the cube has already gone though it and gainied the momentum.

>>376996949
Hula hoop implies both portals are moving at equal speeds. That's the trick.

If a hula hoop goes down on an object at 10 mph, then the down side of the hoop is going at 10, and so is the up side.

Now apply this to portals. the down side is going at 10... but the up side is stationary. What happens as a result of this difference is what causes the A vs B debate.

Even if you insist that A is right, you at least have to admit that the hulahoop analogy is not accurate to describe the situation at hand.

>>376997049

Why the fuck would it gain ewual momentum from a still state with no acting force.

That's not how relative velocity operates at all.

>>376997084

Think of it this way.

I hold a stick out, and a portal comes towards it.

The portal stops halfway through the stick. By your reasoning, I should feel a pull from that part of the stick gaining momentum. Now let's go further with this and say the portal begins moving towarda me again. Is part of the stick now moving towards me while part is moving away from me? What happens to this stick that exists on both sides of the portal at once?

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>>376997105
So you're saying the cube would just stand completetly still, and will not be affected by any of the momentum transferred from the moving portal?

>>376997230

It enters the room with equal momentum as the portal surrounds it. However, the portal immediately stops motion and hits 0 momentum. The cube hits 0 momentum at the same time as the portal does because. So it sits on the platform and then slides down while reacting to the two forces of gravity.

>>376996759
It gains that momentum because thats the momentum it has relative to the blue portal.

Its the orange portal traveling towards the box that gives the box a relative momentum towards the blue portal, and upon exiting the blue portal its momentum is put into effect because the orange portal was going fast and the blue portal was standing still.

>>376986221
I got a theoretical degree in that.

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I hate every single one of you.

>>376997334

The pen has the same momentum as the box relative to the blue portal. If the pen doesn't fly into the air, the box shouldn't either.

Relative momentum is a state of perception. The box and things on the other side of the portal aren't moving towards the portal, it's just perceived to be that way by the source of relativity.

>>376997225
You would feel a pull from the stick.

And how would the stick move towards you? there is only one direction of motion here, you ask what happens to the stick that exits on both sides at once but as long as there is momentum there is only one entrance and one exit.

>>376996841

It's fun.
UNtil things get serious

>And this was the battle of A vs B. Through time the background was lost, historians are still trying to figure out what "A" and "B" were and how the discovered ancient electronic text fragments like "hula-hoop THIS" and "I'll give you something with momentum!" are connected.

>>376994778
Terminal velocity has nothing to do with this and just goes to show you don't understand what you're talking about. If he's falling a long distance that means he had potential energy.

>>376997517

The stick is on both sides of the portal. If the idea is that the room is coming at the box then that applies to everything in the room, even if it isn't grounded. If a fly was floating in the room, it still approaches the box at the same speed that everything else does.

portals only work if they are on the same reference frame, ie no velocity relative to each other

anything else just breaks physics

>>376997463
It IS moving towards the portal though. In fact if you stood and watched through the blue portal you would see exactly that.

As orange gets closer to the box the box gets closer to the blue portal. the box is not given any actual momentum in the room untill it exits the blue portal.

Video here that will give you all the math behind it.
https://www.youtube.com/watch?v=DD-pPWOzWWo&t=551s

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What the fuck is wrong with you b-tards go back to high school and learn the theorem of energy conservation.

>>376997589
You fell down the two holes thus you have infinite height so that makes infinite potential energy. You gain velocity and kinetic energy with the fall. Supposed you aren't in a vacuum, air drags you back and accelerations cancel out so you reach terminal velocity. Kinetic energy remains the same and the energy you are constantly gaining is dissipated with the air resistance. Infinite heating machine.

How old is this argument? Did someone think this up when Portal was originally released?

>>376997859

His math is flawed. The end velocity of the portal's travel is zero because it slams into the platform.

why are you all asuming that portals obey the laws of physics?

>>376997859

No one is arguing that the box doesm't have any relative velocity from the perspective of the orange portal. It's just that the box doesn't continue to have to velocity when the blue portal stops.

>>376997859

>ignores the mass of the cube and the innate resistance it would impose in itself when reacting to the portal

>>376997230
This is probably the only scenario I'd agree on.

>>376997864
How can you talk about energy conservation when portals allow non-conservative force fields that create energy?

>>376997610
Oh yeah the stick is on both sides but the pulling effect will only ever occur opposite the direction the portal is moving. If it moved away from you at high speed it would push you/the stick.

And im not sure what you mean by the room coming at the box. The only thing coming at the box is the orange portal, everything else is stationary.

>>376998135
>doesn't continue to have to velocity

Where does it go? Heat? What decelerates it?

>>376981709
Didn't someone test this out in Garry's Mod?

>>376998001
Well does the box completely pass through the portal before that or not?

>>376998220
Like what, doofus?

>>376998247

Dissipates as force upon contact throughout the environment.

portals are essentialy just doors, drop a doorway on a cube, what happens to it?

>>376991562
I've never been able to see the white and gold dress. I still don't understand how anyone sees this as white and gold

>>376981709
In that case, it's A. The portal is moving towards the cube, the cube is standing still with no speed, hence A makes more sense.
B would make more sense if the cube would be pushed towards the portal on top.

>>376998340
In that case you are moving both portals instead of only one so the velocity of the cube is canceled by the velocity of the exit portal

>>376998287

The problem is that the box doesn't go through all at once to begin with. You have 10% of the object being pulled by the velocity while 90% pulls against it. This slows that 10% down while accelerating the 90% by a distributed amount of the 10% then you do another 10% of the cube. Now you have 80% of a not quite stationary cube pulling on a fresh 10% that is now also pushing against the previous 10% that has been decelerated. The cube is at most going to tumble and hit the ground, but that's only if you ignore the gravity pulling at it to begin with.

>>376998250
Pretty sure I saw a video on YouTube about it long time ago.

>>376998135
If the blue portal is moving at 40mph at some point the box is coming out the orange portal at 40mph. because the orange port is stationary we can say it must be the box that is moving.

The atoms of that box are travelling 40mph at some point. There is nothing to slow them down.

>>376998452

In theory the orange is always moving with the blue when it comes to relativity. When someone looks through a blue portal that moves towards them, what they are seeing is the orange portal moving towards them as well. The momentum ends with the initial actor.