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Applied Mechanics

Q1: A 50 kg boy climbs up a 8 m rope in gymnasiam in 10 sec. The average power developed by the boy is approximately

A 400 watts

B 500 watts

C 4000 watts

D none of these.

ANS:A - 400 watts

Power = Work done/Time.

Work done = Force * Distance.
= 50 * 10 * 8 = 4000 N - m

Power = 4000/10 = 400 N-m/s = 400 watts.



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