A ball of mass m nbsp; moving with veloc

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A ball of mass $ m$  moving with velocity $V$, makes a head on elastic collision with a ball of the same mass moving with velocity $2V$ towards it. Taking direction of $V$ as positive velocities of the two balls after collision are

A

$ - V$ and $2V$

B

$2V$and $ - V$

C

$V$ and$ - 2V$

D

$ - 2V$ and $V$

A ball of mass $ m$  moving with velocity $V$, makes a head on elastic collision with a ball of the same mass moving with velocity $2V$ towards it. Taking direction of $V$ as positive velocities of the two balls after collision are

Due to elastic collision of bodies having equal mass, their velocities get interchanged.