A bullet of mass 0.02kg is fired from a gun weighing 7.5 kg .if the initial velocity of the bullet is 200 m/ s ,calculate the speed with which the gun recoils.
According to the law of conservation of momentum:
Mass of bullet x Velocity of bullet=Mass of gun x Recoil velocity of gun
0.02 x 200=7.5 x recoil velocity of gun
Recoil velocity of gun=0.02 x 200/7.5=0.53 m/s