Question

A boy of mass 80 kg runs a staircase of 50 steps 10 seconds. If every step is 15cm
high, find his power.

Answer 1

Answer:

Given mass of body (m)=50kg

h=45×15=675cm=6.75m

t=9s    δ=10m

Potential energy =mgh

                            =(50×10×6.75)5

                            =33755

Power of the body =TimePotentialenergy​

                               =93375​

                               =375W

Explanation: