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
$ - V$ and $2V$
$2V$and $ - V$
$V$ and$ - 2V$
$ - 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.