JEE Main Physics question
A 50 kg man with a 20 kg load on his head climbs up 20 steps of 0.25 m height each. The work done in climbing is
Answer: (D)
Solution
Total mass lifted = 50 + 20 = 70 kg; total height = 20 × 0.25 = 5 m. W = mgh = 70 × 9.8 × 5 = 3430 J.