A man weighing 70 kg carries a 30 kg box to the top of the building of height 20 m . Then the work d

Question

A man weighing 70 kg carries a 30 kg box to the top of the building of height 20 m . Then the work done by the man is

Professor PC Thomas Classes · Answer

Total mass $m = 70 + 30 = 100 	ext{ kg}$. Work done $W = mgh = 100 	imes 9.8 	imes 20 = 19600 	ext{ J}$.