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

[Predator]

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).

 

[Predator]

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.

 

[Predator]

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...=/