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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mass of the pump - 100 kg
height- 60 m
time- 20s
force= 10N
now mass - 1kg
f=mg;
10=1g
g=10 ms^-2
Potential energy = mgh
100*10* 60=60000 JOULES
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