Elastic collision of equal masses

2016 Phase II 1 question

1. 1 Work, Energy and Power
   Two identical balls A and B having velocities of 0.5 m/s and –0.3 m/s respectively collide elastically in one dimension. The velocities of B and A after the collision respectively will be:
   A –0.3 m/s and 0.5 m/s B 0.3 m/s and 0.5 m/s C –0.5 m/s and 0.3 m/s D 0.5 m/s and –0.3 m/s
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