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Two identical balls A and B collide head...

Two identical balls A and B collide head on elastically. If velocities of A and B, before the collision are `+0.5 m/s and -0.3 m/s` respectively, then their velocities, after the collision, are respectively

A

-0.5 m/s and +0.3 m/s

B

+0.5 m/s and +0.3 m/s

C

+0.3 m/s and -0.5 m/s

D

-0.3 m/s and +0.5 m/s

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