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Homework Help: Conservation of Momentum!

  1. Oct 13, 2008 #1
    1. The problem statement, all variables and given/known data

    2. Relevant equations

    [PLAIN]http://upload.wikimedia.org/math/7/7/4/7745116605c54295c6c3b696cea2d39f.png[/CENTER][/URL] [Broken]

    3. The attempt at a solution
    I have gotten these problems wrong too many times. I know that I have to apply both the conservations of momentum and kinetic energy, but for some reason I can't come up with the right answer.

    m1=21.3g v1=24.6cm/s
    m2=11.6g v2=11.3cm/s

    I don't know how to solve these relations with two unknowns. I've tried using substitution from the kinetic energy equation, but I still got it wrong for some reason. Any help for a desperate physics student?​
    Last edited by a moderator: May 3, 2017
  2. jcsd
  3. Oct 13, 2008 #2
    Anyone know where I'm going wrong?
    Last edited: Oct 13, 2008
  4. Oct 13, 2008 #3
    No one? Really?
  5. Oct 13, 2008 #4
    Maybe someone can refer me to another website to answer these questions?
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