371704
If \(n\) bullets each of mass \(m\) are fired with a velocity \(v\) per second from a machine gun, the force required to hold the gun in position is
1 \((\mathrm{n}+1) \mathrm{mv}\)
2 \(\frac{\mathrm{mv}}{\mathrm{n}^{2}}\)
3 \(\frac{m v}{n}\)
4 \(n^{2} m v\)
5 \(\mathrm{mnv}\)
Explanation:
E Given, Number of bullet \(=\mathrm{n}\) Mass of bullet \(=\mathrm{m}\) Velocity of bullet \(=\mathrm{v}\) The force required to hold the gun in position is Net force \(=\Delta \mathrm{p} / \Delta \mathrm{t}=\frac{\mathrm{mnv}}{1}\) \(=\mathrm{mnv}\)