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# A body of mass m moving with a constant velocity V hits another body of the same mass moving with velocity V but in the opposite direction and sticks to it. The velocity of the compound body after collision is

$\begin {array} {1 1} (a)\;V & \quad (b)\;2V \\ (c)\;zero & \quad (d)\;4V \end {array}$

Net momentum before collision =0
Net momentum after collision =0
So the correct answer is 0