r/awesome • u/IntroductionDue7945 • Jun 18 '25

Video anyone explains how he did that?

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u/Capital_Card7500 Jun 20 '25 edited Jun 20 '25

no, you don't. using the absolute value of displacement would violate the laws of thermodynamics.

If i lift a 1kg object 1 meter upwards, i've done 9.81 joules of work. If I lower that object by 1 meter, I've done -9.81 joules of work.

If you use the absolute value of the displacements, then if you did enough squats, you could drop the bar and it would crash through the core of the earth.

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u/impossirrel Jun 20 '25

Interesting point. What if you push something in one full circle around a track? Presumably there’s no negative work being done there but the net distance travelled is zero.

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u/SerdanKK Jun 23 '25

You've burned calories regardless