A loaded spring gun of mass M fires a bullet of mass m with a velocity v at an angle of elevation `theta`. The gun is initially at rest on a horizontal smooth surface. After firing, the centre of mass of the gun and bullet system

Options

A. (a) moves with velocity `v/Mm`
B. (b) moves with velocity `(vm)/(mcostheta)` in the horizontal direction
C. (c) does not move in horizontal direction
D. (d) moves with velocity `(v(M-m))/(M+m)` in the horizontal direction

Answer

C

Explanation

Net horizontal force on system is zero.