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Gay Lussac's Law

A crane lifts...

Question

A crane lifts $300 k g$ weight from earth's surface upto a height of $2 m$ in $3$ seconds . The average power generated by it will be

1960 W

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2205 W

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4410 W

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0 W

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Solution

The correct option is A $1960 W$
Given,
$m = 300 k g$
$g = 10 m / s^{2}$
$h = 2 m$
$t = 3 s e c$
The Average power generated is given by,
$P = \frac{m g h}{t}$
$P = \frac{300 \times 9.8 \times 2}{3}$
$P = 1960 W$

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