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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


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

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

    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.

  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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