1.

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

A. -0.5m/s and +0.3m/s
B. +0.5m/s and +0.3m/s
C. +0.3m/s and -0.5m/s
D. -0.3m/s and +0.5m/s
Answer» E.


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