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A loaded spring gun of mass M fires a bu...

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

A

Moves with a velocity `(v(M-m))/(M+m)` in the horizontal direction

B

Moves with velocity `(mv cos theta)/((M+m))`

C

Moves with a velocity `v((m)/(M+m))`

D

Moves with a velocity `((mv sintheta)/(M+m))`

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The correct Answer is:
D
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