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
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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 =
Time
Potentialenergy
=
9
3375
=375W
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