A boy of mass 50kgruns upto a staircaseof45steps in 9sec. If the height of astep is 15 cm. Find his power
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total distance ascended
=45*15
=675m
work done =FS
=50*10*675(converting force into Newton by multiplying it by 10)
=337500 J
Power=work/time
=337500/9
=37500 Watt
hence the power developed is 37500 Watt
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