A pump is used to lift 100kg of water from a well 60m deep, in 20 s. If force of gravity on 1 kg is 10N, find potential energy stored in the water and power spent by the pump.
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Answer:
Given:-
Mass = 100kg
Force = 100×10 = 1000N
Distance = 60m
Time = 20sec
To find:-
Potential energy and power
By applying, P.E = mgh
= 100×1000×60
= 6000000J.
By applying, P = W/T
= 6000000/20
= 300000W.
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