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Homework Help: Proof Change of kinetic energy in collision

  1. Nov 28, 2011 #1
    1. The problem statement, all variables and given/known data

    Give equation change of kinetic energy in collision :
    Q = 1/2 μ v2 (1-e2)

    Proof that for both energy kinetic of particle is loss after the collision?

    2. Relevant equations

    e = (V2 finish - V1 finish) / (V1 initial - V2 initial)
    μ = reduced mass = (m1.m2) / (m1+m2)
    v = v1inital - v2initial

    3. The attempt at a solution

    k1init = ...
    k2init = ...
    k1finish = ...
    k2finish = ...
     
  2. jcsd
  3. Nov 28, 2011 #2
    Besides the above you need another equation

    i.e.

    conservation of momentum.
     
  4. Nov 28, 2011 #3
    I just only had that equation.
     
  5. Nov 28, 2011 #4
    The principle of conservation of momentum is obeyed in every collision ( if used correctly!) and so can always be used just like 'f = ma' for example.
     
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