a boy and a man raise a box of same mass to the same height in 20 s and 50 s respectively compare the work done and the power developed by them
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Answer:
Work done by first man = mgh = 50 * 10 * 2
= 1000 J
Work done 2nd man = mgh
= 50 * 10 * 2
= 1000 J
Power developed by 1st man = Work /
Time
= 1000/20
= 50 Watt
Power developed by 2nd man = Work /
Time
= 1000 / 50
= 20 Watt
:: Work done by both of them is same, but power developed by them is 50 Watt and 20 Watt respectively.
Hope it helps you
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