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Mass collides with spring and mass

  1. Jun 25, 2012 #1
    A block of mass m1=1.60kg initially moving to the right with a speed of +4.00m/s on a frictionless horizontal track collides with a spring attached to a second block of mass m2=2.10kg initially moving to the left with a speed of -2.50m/s. The spring constant is 600N/m. At the instant block 1 is moving to the right with a speed of +3.00m/s, determine the velocity of block 2. Determine the distance the spring is compressed at that instant.

    KE=1/2mv^2
    Elastic PE=1/2Kx^2
    Fp=Kx
    Fs=-Kx

    I'm going to start with conservation of energy, but this is too complex of a system for me to even begin. A step by step of how to set up this equation would be most helpful. Thank you all for your help!
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Jun 25, 2012 #2
    Try conservation of momentum.
     
  4. Jun 25, 2012 #3
    Use both conservation of energy and comservation of momentum to get 2 equations for the 2 unknowns.
     
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