When a bullet is fired from a rifle its momentum become $$20\ kg\ m/s$$. If the velocity of the bullet is $$1000\ m/s$$ what will be its mass?
A
$$30\ g$$B
$$5\ kg$$C
$$20\ g$$D
$$500\ g$$
$$\therefore$$ Mass of bullet $$m = \dfrac{P}{v} = \dfrac{20}{1000} = 0.02$$ kg $$ = 20$$ g
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