Question

A boy weighing 50 kg climbs up a vertical height of 100m in 200 sec. Calculate the -



(a) amount of work done by him

(b) potential energy gained by him

(c) power of the boy (g = 10m/s2)

Answer 1

A) work done = mgh = 50 *100 *10
= 50000 J
B) potential energy = work done = 50000
C) Power = work done /time
= 50000 /200 = 250 W.