Question

A boy of mass 50 kg climbs a staircase of 20 steps with step height 10 cm in 5 minutes. Then power developed by boy is ______​

Answer 1

Answer:

$giving \: answer -$

375 W

$explaination -$

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 = 3375/9

=375 W

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