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Physics
A gun fires N bullets per second, each of mass m with velocity v. The force exerted by the bullets on the gun is
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Q. A gun fires $N$ bullets per second, each of mass $m$ with velocity $v$. The force exerted by the bullets on the gun is
J & K CET
J & K CET 2008
Laws of Motion
A
$vNm$
60%
B
$ \frac{mv}{N} $
19%
C
$ mvN^{2}$
7%
D
$ \frac{mv^{2}}{N}$
13%
Solution:
$F=p \times t$
$ = Nm ( v - u ) t$
$= mNv$ (as $u =0,\, t =1\, s$)