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Homework Help: 2 mass spring system

  1. Dec 5, 2008 #1
    1. The problem statement, all variables and given/known data
    Consider two blocks of identical mass m. Block 1 can only move horizontally on a smooth table, and block 2 can only move vertically down the side of the table. Both blocks are connected by a spring (which is a direct path, so it should actually go through the table, but it doesn't) The spring has rest length L and spring constant k. No friction in this problem.

    2. Relevant equations
    Need the forces on each block to write Newton's equations

    3. The attempt at a solution
    I know block one only has the spring force and block 2 has both gravity and the spring force. The spring force is -kx where x is the distance from the equilibrium position of the spring. This is where i get stuck. I can't figure out how to write the change in the length of the spring.

    Someone please help!!
  2. jcsd
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