A boy weighing 40 kg makes a high jump of 1.5 m.
(i) What is his kinetic energy at the highest point?
(ii) What is his potential energy at the highest point? (g = 10 m/s2).
Given,
Mass of the boy, m = 40kg
Height gained by it, h = 1.5m
(i) K.E = 0 at highest point because velocity of the high jumper at the highest point will be 0
(ii) Potential Energy, P.E = mgh
= 40 × 10 × 1.5
= 600 J