A gun of mass 10 kg fires 4 bullets per second. The mass of each bullet is 20 g and the velocity of the bullet when it leaves the gun is `300ms^(-1)`. The force required to hold the gun while firing is

Options

A. 6 N
B. 8 N
C. 24 N
D. 240 N

Answer

C

Explanation

Rate of change of momentum of the bullet in forward direction = Force required to hold the gun.
`rArr nmv = F rArr F = 4 xx 20 xx 10^(-3) xx 300`
= 24N.