Question

A boy of mass 50 kg runs up a staircase of 45 steps in 9 s. If the height of each step is 15 cm, find his power. Take g = 10 m s 2​

Answer 1

Answer:

Correct option is

A

375W

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 =

Time

Potentialenergy

=

9

3375

=375W