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Homework Help: Elastic Collision between 2 Particles

  1. Sep 29, 2010 #1
    Hi, heres my problem.

    A particle of m1 and initial speed v0 strikes a stationary particle of mass m2, and scatters at 30 degrees to its original direction with speed v0/3. Find the angle, in degrees, between the directions of the two particles after the collision.

    I found that the velocity of the m2 after the collision to be 2/3v0 due to conservation of energy.

    Can anyone give me ideas on how to find the contained angle? Thank you.
  2. jcsd
  3. Sep 29, 2010 #2


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    Homework Helper

    Since it is a collision as well, you'd need to apply conservation of linear momentum in both the x and y directions.
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