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Homework Help: Mass spring system

  1. Nov 17, 2014 #1
    1. The problem statement, all variables and given/known data

    consider a mass spring system mounted on a horizontal surface. The left end of the spring is rigidly mounted, and the spring constant is 27 N/m. A block with a mass of 7 kg is placed on the right side of the spring and compresses the spring a distance of .15 m. The region on the horizontal surface under the spring from the barrier on the left side to the equilibrium length of the spring is frictionless. The region of the horizontalsurface to the right of the equilibrium length of the spring has a coefficient of kinetic friction equal to .55.
    A. How far does the block slide before it stops?
    B. How much work is done on the block by the spring? How much work is done on the block by friction?
    C. What is the power dissipated by friction?
    2. Relevant equations
    Conservation of energy

    3. The attempt at a solution
  2. jcsd
  3. Nov 17, 2014 #2
    So, where is your work?
  4. Nov 17, 2014 #3
    I have about two pages of work.. Too much to post..
  5. Nov 17, 2014 #4
    I've tried so many different things I'm just going in circles.. I've been working on this the past two days..
  6. Nov 17, 2014 #5
    • Note that problems or attempted solutions should not be posted as image attachments or links.
    This what I have after restartingrestarting

    Attached Files:

  7. Nov 17, 2014 #6
    I could really use any help..
  8. Nov 17, 2014 #7
    How would you approach it?
  9. Nov 18, 2014 #8
    Have you thought about writing F = m*a? That's a good place to start.
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