An electric motor creates a tension of 4500 N in hoisting cable and reels it at the rate of 2 m/s. What is the power of electric motor ?

9 W

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9 KW

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225 W

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9000 H.P

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Solution

The correct option is A 9 KW
$P = F . v$
$= 4500 \times 2$
$= 9000 W = 9 K W$

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