A man raises a box of mass 30 kg through a height of 5 metre for stop if the force of gravity on 1 kg mass is 10 newton. then the work done by him is
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Answer:
The work done by each person is,
W=50kg×10m/s
2
×2m
=1000 J
Power is equal to work done per unit time
Power of first person will be,
=
10sec
1000J
=100W
Power of second person will be
=
50sec
1000J
=20W
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