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A girl of mass 40 kg climbs a rope 6 m long at constant speed in 15 seconds. What power she expands during the climb?
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A girl of mass 40 kg climbs a rope 6 m long at constant speed in 15 seconds. What power she expands during the climb?

User Gove
by
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1 Answer

2 votes
Given,
Mass m=40kg
Height h=6m
Time=15s
Power=????

Let g= 10ms−2

Potential energy =m×g×h
=40×10×6J
=2400J

Power= Energyconsumed/Timetaken

Power= 2400J/15s

Power=160J/s

So power spent by girl is 160 watts
User Moltarze
by
7.1k points
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