Question

If a gun fires 'N' bullets per second each with a velocity u and mass m is the mass of each bullet then the force needed to hold the gun is:​

Answer 1

Answer:

Explanation:

Initial velocity of bullet u=0

Final velocity of bullet is v

Change in momentum of one bullet ΔP

1

​

=mv−0=mv

In one second, number of bullets fired is n

So change in momentum of bullets in one second =ΔP=nΔP

1

​

=mnv

Force exerted on machine gun by bullets F=

Δt

ΔP

​

⟹ F=

1

mnv

​

=mnv is the answer