Question

A bullet of mass 0.02kg fired from a gun weighing 7.5kg if the velocity of bullet is 200m/s.calculate the speed

Answer 1

From conservation of momentum

Recoil velocity of gun = -mu / M
= -(0.02 kg × 200 m/s) / 7.5 kg
= -0.533 m/s
[-ve sign indicates that gun moves in the direction opposite to that of bullet]

∴ Recoil speed of gun is 0.533 m/s