Question

47. A man weighing 60 kg climbs up 45 steps staircase of a building in 9 seconds. If height of each step is 10 cm, then how much power the man has employed? (Take g = 10 m/s2 (c) 500 W (a) 300 W (b) 250 W (a) 450 W (Odisha)​

Answer 1

Answer:

Total work done by man in convering 20 steps =mgh=80×10×0.2×20=3200j

So, power =work done/time taken =3200/10=320watt