A body of mass 100 kg is lifted up by 10 m, Find:
(i) The amount of work done.
(ii) Potential energy of the body at their height (value of g = 10 m/s2)
Given,
Mass of the body, m = 100kg
Height, h = 10m
Acceleration due to gravity, g = 10m/s
(i) Work done, w = mgh
= 100 × 10 × 10
= 10,000 J.
(ii) Potential energy, PE = Work done (At any point above the surface of the ground, the work done in raising the body is numerically equal to the potential energy)
Potential energy = 10,000 J
Or, Potential energy = 10KJ