When a bullet is fired from a rifle its momentum become $20 k g m / s$ . If the velocity of the bullet is $1000 m / s$ what will be its mass?

30 g

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5 k g

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20 g

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500 g

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Solution

The correct option is D $20 g$
Given : $P = 20$ $k g$ $m / s$ $v = 1000$ $m / s$
$∴$ Mass of bullet $m = \frac{P}{v} = \frac{20}{1000} = 0.02$ kg $= 20$ g

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