Question
a gun is mounted on a railroad car .the mass of the car,the gun,the shells, and the operator is 50m where m is the mass of one shell.if velocity of the shell w.r.t. The gun(in its state before firing) is 200m/s,what is the recoil of the car after the second shot?neglect friction.Joshi sir comment
in first firing
m200 = 49mv so velocity of gun = 200/49
now apply momentum conservation again by taking 200/49 as the velocity of gun