A loaded spring gun of mass M fires a shot of mass m with a velocity v at an angle of elevation `theta` . The gun is initially at rest on a horizontal frictionless surface. After firing the centre of mass of the gun-shot sysem
If we consider a system consists of gun plus mass m. Then no external force is present on the system. So, the acceleration of centre of mass of system will be zero . Since initially the system is in rest . So centre of mass will always remain at rest.
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