Inelastic Collisions

  1. 1. The problem statement, all variables and given/known data

    In the figure below, block 2 (mass 1.4 kg) is at rest on a frictionless surface and touching the end of an unstretched spring of spring constant 170 N/m. The other end of the spring is fixed to a wall. Block 1 (mass 2.0 kg), traveling at speed v1 = 4.0 m/s, collides with block 2, and the two blocks stick together. When the blocks momentarily stop, by what distance is the spring

    2. Relevant equations

    m1v1=m2v2

    3. The attempt at a solution
    I attempted the solution but I am confused about the 170N/m
    How would I use that information and relate it to the equations of inelastic collision?
     
  2. jcsd
  3. rl.bhat

    rl.bhat 4,433
    Homework Helper

    Find the velocity of the combined blocks after collision. Then find the KE of the the combined blocks.
    What is the expression for the energy stored in a compressed spring?
     
  4. ohhh okk i got it
    I had to use W=1/2kx^2
    they gave k and i figured out W through the KE equation.
    it was 0.33 m if you were curious.
     
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