Question

A boy climbed 50 steps of building each height 15 cm. If he has 50 kg mass find workdone. [ g =10 m/s² ]​

Answer 1

Explanation:

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 KG