Question

A bullet of mass 15g leaves the barrel of gun with a velocity of 120m/s.The gun recoils with a velocity of 1m/s. Find the mass of the gun.

Answer 1

initial momentum of body is zero as it is at rest so

MU=mv where M is mass of gun U is velocity of gun that is recoil velocity now vice versa with m and v now by putting values the mass of gun will be 1.8 kg