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Homework Help: Billiar Balls

  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?

    How would I do this one and what formulas would I use??
  2. jcsd
  3. Oct 22, 2005 #2


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    This might help:
    http://upload.wikimedia.org/wikipedia/en/3/34/Deflection.png [Broken]
    Last edited by a moderator: May 2, 2017
  4. Oct 23, 2005 #3
    Use conservation of momentum, remember that momentum is a vector.
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