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Homework Help: Inelastic collison problem

  1. Sep 21, 2010 #1
    1. The problem statement, all variables and given/known data

    Object A, which has a mass m and a velocity v0i, collides head-on with object B, which has a mass 2m and a velocity 1/2v0j. Following the collision, object B has a velocity of 1/4v0i.

    -Find the velocity of object A after the collision.

    -Express the change in kinetic energy in terms of m and v0

    2. Relevant equations



    3. The attempt at a solution

    I got 1/2i+j for the velocity and I am not sure why it is wrong. I set up the conservation of momentum equation and cancelled the "m"s and just multiplied the coefficients(1 and 2) times the number in front of the velocity(either 1, 1/2, or 1/4) if that makes any sense.
     
  2. jcsd
  3. Sep 21, 2010 #2
    bump.

    anyone? It doesn't seem difficult at all. I don't know what I'm missing here..
     
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