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A force of 100N is applied on an object and the object displaced to a distance of 8m in 20s then the power on object is

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160 W

40 W

3200 W

1000 W

answer is B.

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Detailed Solution

$Force F = 100N, Displacement S = 8m, Time t = 20s$

$p = \frac{W}{t} = \frac{FS}{t} = \frac{100 \times 8}{20} = 40 W$

$∴ p = 40 W$

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