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Elastic collisions of a sliding block

  1. Apr 1, 2009 #1
    1. The problem statement, all variables and given/known data[/b]
    Block 1, with mass m1 and speed 3.6 m/s, slides along an x axis on a frictionless floor and then undergoes a one-dimensional elastic collision with stationary block 2, with mass m2 = 0.69m1. The two blocks then slide into a region where the coefficient of kinetic friction is 0.39; there they stop. How far into that region do (a) block 1 and (b) block 2 slide?

    I used the elastic collision formula and got v1f= .6604m/s and v2f=4.260 m/s

    can i use conservation of ke?? to find mass?
  2. jcsd
  3. Apr 1, 2009 #2


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    Homework Helper

    You can determine the distance by observing the deceleration of the friction for each block and applying it to the velocity.

    F = m*a = μ*m*g

    a = μ*g
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