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Homework Help: Update of an old problem, the OP didnt put it down fully

  1. Nov 12, 2007 #1
    1. The problem statement, all variables and given/known data

    https://www.physicsforums.com/showthread.php?t=77424

    It's that exact problem, except I need the latter parts to it.

    (a) What is the position of the block?
    m
    (b) What is the work that has been done on the block by the applied force?
    J
    (c) What is the work that has been done on the block by the spring force?
    J
    During the block's displacement, find the following values.
    (d) The block's position when its kinetic energy is maximum.
    m
    (e) The value of that maximum kinetic energy.
    mJ

    3. The attempt at a solution

    I solved A by myself from Fx = 1/2kx^2. Solved for x.

    Then for C, I did -1/2kx^2. And B = 1/2kx^2.

    I need parts D and E. How would I go about solving them? I know that deltaK = Kf - Ki = W(applied force) + W(spring).
     
  2. jcsd
  3. Nov 12, 2007 #2
    OK, am I doing something? I never get any replies on any of my threads....can someone PLEASE help? I would really appreciate it.

    Thanks.
     
  4. Nov 12, 2007 #3
    Come on guys please...this problem is due in about 1 hour on Webassign. ANY help would be appreciated. I was referred to this problem because supposedly it was the best but I'm not really seeing much help...=/
     
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