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The cable of an electric motor exerts a force of 50 N on a body and pulls it through a distance of 20 m in one minute. What is the power of the motor?

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10.67 W

16.67 W

12.67 W

30.12 W

answer is B.

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Detailed Solution

Power = Work/Time

Given, F = 50 N

s = 20 m

t = 1 minute = 60 s

Work = force × displacement

∴ Work = 50 × 20 = 1000 J

Power = work/ time = 1000/60 = 16.67 W

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