A machine gun is mounted on a flat railroad car . The gun is firing bullets at the rate of 10 bullets per second each of mass 10 g . The bullets come out with velocity `500 m s^(-1)` relative to the car . Calculate the acceleration of the car at the instant when its mass is 200 kg . Also calculate the force at that instant.

Answer

`0.25 m s^(-2) , 50 N `