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Homework Help: Simple 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 horizontal surface 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

    3. The attempt at a solution
  2. jcsd
  3. Nov 17, 2014 #2
    I'm thrown off because I don't have the velocity of the block as it starts from rest and is launched by the spring. Do I use conservation of energy?
  4. Nov 18, 2014 #3
    That's a good start.
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