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Q.

The power (P) of an engine lifting a mass of 100 kg up to a height of 10m in 1 min is [J&K CET 2013)

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a

163.3 W

b

9800 W

c

10000 W

d

5000 W

answer is A.

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Detailed Solution

Power = Work done  Time Work done =mgh=100×9.8×10Time = 1 min = 60 s∴  P=100×9.8×1060=163.3 W
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The power (P) of an engine lifting a mass of 100 kg up to a height of 10m in 1 min is [J&K CET 2013)