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If a machine gun fires n bullets per second and mass of each bullet is m, then what will be the power of machine gun?

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If a machine gun fires n bullets per second and mass of each bullet is m, then what will be the power of machine gun?

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Change in momentum of machine gun on firing one bullet = Momentum of bullet = mv

Therefore recoil force on gun

\(F = n\frac{mv}{1} = mnv\)

∴ Power of machine gun

P = Fv = mnv

or P = mnv2

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