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:

Answer

Given that,

Mass of boy, m=50kg

Potential energy at a height of 45 steps , P=mgh=50×10×45×0.15=3375J

Time taken to climb 45 steps , t=9secs

Power of boy =

t

P

=

9

3375

=375 W

Answer 2

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