Take a guess at how many reps of 100kg benchpress it takes to

>>41928963
like 1 or less

>>41928979
Wrong

Take a guess at how many slurps of dick to get Chad off

>>41928963
infinite if you're doing it powerlifting style

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>>41928989
how would you even know?

during the rep? Probably less than one.

The overall effect each rep has on energy spent on recovery will amount to 10s of kcal per rep though.

1,000 niggawatts

>>41928963
0.05

>>41929015
Ten seconds of calories?

>>41929004
Here's a hint Work = ForcexDistance

>>41929065
Did you learn about that in physics class today son?

Fucking summerfags

>>41928963
https://en.wikipedia.org/wiki/Joule
>The energy required to lift a medium-size tomato (100 g) 1 m vertically from the surface of the Earth.

( 100 X 1000 ) x 0.3 = 30000J = 7.17 kcal.

So about 1/7 of a rep if your length of moment is 30cm.

>>41929065
(100kg)(1m)(~10m/s2) = 1000J, assuming the travel distance is a meter. According to that it's about 1kcal

>>41929064

No, like tens of kcal.

>>41929065
>>41928963

I remember my first high school physics lesson too.

I guarantee your 'calculation' hasn't taken into account the energy involved in stabilization.
Whatever your answer is, it's wrong.

>>41929088
kek

>>41929088

>J is the same as Kcal
You need to convert, son

>>41929101
>energy involved in stabilization
kek at this meathead getting triggered because he doesnt understand BASIC maths

>>41929118

hurp durp fuck my ass you're right, i forgot that bit. 0.23kcal

>>41929088
>1m RoM

golem get ye gone

>>41928963
About tree fiddy.

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>>41928963
>benching this low

Fucking summer fags.

Alright fellas let's get to work

Let's assume one's arm is about 60 cm long l. 0.6m

one kcal is roughly 4,18 kJ

We can calculate of the increase of potential energy of the weight by using the formula Ep = mgh, where m = 100 kg, g = 9.81m/s^2) and h = 0.6m

Ep = 100 kg * 9,81 m/(s^2) * 0,6 m = 588.6 J l. 0,5886 kJ

To get the required amount of reps we just multiply this value by x times to get the answer given above (4.18)

0,5886 * x = 4.18
x = 4.18/0.5886
x = abt. 7,12

So physically it'd take 7 reps to burn 4,18 kJ (=1 kcal) by lifting 100 kilos

I might have made some mistakes but this is really bbys first physics

>>41929126
>>41929101
Any response fuccboi?

>>41928963
moving 100kg up 30cm gives us
PE=mgh=294 J=0.0702677 kcal per rep
1/0.0702677=14.23 reps per calorie

>>41929235

Yeah, you haven't taken into account my dick in your mums ass

>>41929235
>>41929253

What he said

>>41929253
>that summer response

>>41929230
nice info

i thought you burn a lot calories in your workout

>>41929253
Wow you sure got me, took long enough. Next time try harder fucking brainlet. >>41929230
What about lowering the weight shithead

>>41929065
This math doesn't work for lifting weights, since the human body uses leverages to move the weight.

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Judging by how slow the cal counter on the treadmill goes, I would say a few reps at least.

Body is efficient af

>>41929307
topkek. stay in school motherfucker

>>41929230
Freshmen are so cute.
Here's the thing, the math you did takes an idealized and simplified model.
Let's take into account that body activity isn't as simple as just motion.
If we were to leave it at Joules it would be alright because we're then only referring to it as work and it's just the movement. Calories though are the whole process of burning available fuel so to speak in order to be able to realize work.
The actual caloric impact of bench pressing 100kg for that distance will be different because it then involves the whole body as a system, including up to recovery from benching.
This is why when people calculate the calories burnt by running/cycling or whatever, they not only use the numbers directly from the work in the timeframe it ocurred.

There's extra stuff, but the point is that you (assuming you're the faggot OP) shouldn't get all obnoxious from knowing how to calculate "perfect spherical cows".

On the other hand, yeah, lifting itself barely burns calories, hence why it's not advised for that, unlike cardio (or just eating less). Although having more muscle mass does need more, so there's that too.

>>41929638
Why don't you just fuck off you autistic faggot.

>>41928963
>what is EPOC

>>41929088
That's assuming 100% efficiency, human body produces wastes a ton of energy producing heat via muscle friction etc.

>>41929230
>I might have made some mistakes but this is really bbys first physics

And when you get to big boy physics, you'll learn about mechanical efficiency and take into account the fact that human muscles aren't even close to 100% efficient (if they were, you'd have to run around constantly just to avoid hypothermia) and, as another anon said, it takes even more energy to engage all your stabilization muscles. You're also using energy to control the weight on its way down.

You didn't even do bby's first physics right. Work is calculated as force x DISPLACEMENT not distance. Over the course of one rep, down and up, the barbell ends in the same place it began so on your AP physics test, the correct answer would be 0.

>>41929720

>Acting smug
>Being wrong
>Getting BTFO

Pick 3

>>41929333
Man you really are new

>>41930205
The human body isn't perfect and doesn't conserve energy perfectly. Don't be stupid op and consider killing yourself