A machine gun is mounted on a flat rail 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 ms^(-1)` from the rear. Calculate the acceleration of the car at the instant when its mas is 200 kg. Also calculate the force at that instant.

Options

A. `0.25 m//sec^2 , 100N`
B. `0.5 m//sec^2 , 50 N`
C. `0.25 m//sec^2 , 50 N`
D. `0.5 m//sec^2 , 100N`

Answer

C