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Homework Help: Conservation of Energy object of mass

  1. Mar 4, 2008 #1
    [SOLVED] Conservation of Energy

    1. The problem statement, all variables and given/known data
    An object of mass m starts from rest and slides a distance d down a frictionless incline of angle . While sliding, it contacts an unstressed spring of negligible mass as shown in Figure P8.10. The object slides an additional distance x as it is brought momentarily to rest by compression of the spring (of force constant k). Find the initial separation d between object and spring. (Use theta for , g for acceleration due to gravity, and m, k and x as necessary.)

    http://img214.imageshack.us/my.php?image=p810uu0.gif

    2. Relevant equations

    Wspring = 1/2kx^2
    W = F*d

    3. The attempt at a solution

    I thought that the work of the spring would equal the work of gravity. so I set the two equations equal to one another, but apparently that is wrong.
     
  2. jcsd
  3. Mar 4, 2008 #2
    solved it, nevermind
     
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