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Homework Help: Elastic collisions and speed

  1. Jun 21, 2014 #1
    Ball A, a 0.055 kg ball, moving with a speed of 2.50 m/s collides head-on with ball B, a 0.095 kg ball initially moving away from it at a speed of 1.15 m/s. Assume a perfectly elastic collision. Take the initial velocity of ball A to be in the positive x direction.

    (A) What is the speed of ball A after the collision?

    (B) What is the speed of ball B after the collision

    Can anyone walk me through this? I'm not sure where to start...
  2. jcsd
  3. Jun 21, 2014 #2
    No effort, no help. Give us some of your thoughts on the problem at least.
    Last edited: Jun 21, 2014
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