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Billiard Balls question

  1. Oct 22, 2005 #1
    The question is:
    - Two billiard balls of equal mass move at right angles and meet at the origin of an xy coordinate system. Ball A is moving upwards along the y axis at 2.0 m/s, and ball B is moving to the right along the x axis with speed 3.7m/s. After the collision, assume elastic, ball B is moving along the positive y axis. What is the final direction of ball A and what are their two speeds?
  2. jcsd
  3. Oct 22, 2005 #2
    Kinetic energy maintained

    The collision is elastic, and that means that the kinetic energy is maintained - just use that fact to find the answer
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