Two balls approach each other at 3 m/s and 5 m/s and collide elastically. Their speed of separation is:

  1. 15 m/s
  2. 4 m/s
  3. 2 m/s
  4. 8 m/s
Answer

D) 8 m/s

Relative speed of approach = 3 + 5 = 8 m/s = relative speed of separation. SLO P-11-B-12 · Application

Physics MCQ · More Momentum and Collisions MCQs · Practise