Question

A boy weighing 50 kg up a vertical height of 100m calculate the amount of work done by him .how much potential energy does he gain g= 9.8m/s​

Answer 1

Explanation:

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Answer 2

Given,

  mass of boy = m = 50 kg

   height = h = 100m

   since boy does not move anything with his force, work done by him is zero

   work done on the boy = gain in potential energy

   P.E=mgh

   P.E=50×9.8×100

  P.E=49KJ

 so, potential energy gained by boy is 49 KJ

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