Question

A man of 60kg runs up of flight of 30steps in 40sec. If each step in 20cm high calculate the power

Answer 1

Answer:

Explanation:

each step = 20cm

30 steps = 30×20= 600 cm = 6 m

now, power = W/Time

for work to be done we need force × displacement

force= mg

therefore W= mgh

= 60 × 9.8 × 6

= 3528 J

power = W/T

= 3528 ÷ 15

= 235 watt. ans..