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Elastic Collision of marbles

  1. Dec 3, 2006 #1
    1. The problem statement, all variables and given/known data
    A 45 g steel marble collides obliquely w/ an identical stationary marble, and continues at 55 degrees to its original direction. The collision is perfectly elastic. What is the angle between the direction taken by the target ball and the original direction of the incident ball?

    3. The attempt at a solution
    is it just 55 degrees?
     
  2. jcsd
  3. Dec 3, 2006 #2

    OlderDan

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    It is not 55 degrees. You need to apply conservation of momentum and conservation of energy (kinetic energy in this case) to find the magnitude and direction of the velocity of the target ball.
     
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