Question

An office boy whose mass is 55.0 kg runs up 20 steps, each step is 30.0 cm high in 40.0 seconds. Find the power in watts expended by the office boy?

Answer 1

Explanation:

m = 55kg

h = 20×30

= 600cm = 6.0m

t = 40s

g = 9.8m/s²

Power = mgh/t

= (55)(9.8)(6) / 40

= 3234 / 40

= 80.85W

HOPE IT HELPS !