<Dd> Ball 1: mass = 3 kg, velocity = 4 m / s </Dd> <Dd> Ball 2: mass = 5 kg, velocity = − 6 m / s </Dd> <P> After collision: </P> <Dl> <Dd> Ball 1: velocity = − 8.5 m / s </Dd> <Dd> Ball 2: velocity = 1.5 m / s </Dd> </Dl>

In an elastic collision between two bodies which of the following is not true