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

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SUMMARY

The discussion revolves around a physics problem involving a block subjected to forces, specifically focusing on calculating the block's position and kinetic energy. The user has successfully solved parts (a), (b), and (c) using the formulas for work done by applied and spring forces, specifically \( W = \frac{1}{2}kx^2 \) for both. However, they seek assistance with parts (d) and (e), which require determining the block's position at maximum kinetic energy and the value of that kinetic energy. The user expresses urgency as the assignment is due imminently on Webassign.

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Homework Statement



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

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).
 
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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.
 
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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