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Momentum and energy

  1. Jun 9, 2016 #1
    1. The problem statement, all variables and given/known data
    The masses of blocks A and B are 2 kg and 3 kg, respectively. Block A slides to the right on the smooth surface and strikes the spring attached to stationary block B. The spring deforms during the collision process. What quantity do the blocks have in common at the instant the spring has the maximum compression?

    The answer is velocity and I'm unsure how.

    2. Relevant equations
    mv1 + ∫ΣFdt = mv2


    3. The attempt at a solution
     
  2. jcsd
  3. Jun 9, 2016 #2

    haruspex

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    If the velocities are not the same, what is happening to the length of the spring?
     
  4. Jun 9, 2016 #3
    You slick guy you... compressing or extending. Makes sense now. Thanks.
     
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