A boy weighing 50 kg climbs up a vertical height of 100 m. Calculate the amount of work done by him. How much potential energy does he gain? (g = 9.8 m/s)
Given,
mass of the body, m = 50kg,
Acceleration due to gravity, g = 9.8 m/s2, height, h = 100m
Potential energy = Work done = mgh
= 50 × 9.8 × 100
= 59000J
= 59KJ
(At any point above the surface of the ground, the work done in raising the body is numerically equal to the potential energy)