1. The problem statement, all variables and given/known data L = Stretched distance L0 = Unstretched distance 2. Relevant equations W = 1/2kL2 3. The attempt at a solution In attempting to help a friend with this problem, having taken this same physics class under a different professor, i was completely stumped by this problem. I know that Fx = kL, but i can't make any headway on figuring out the part of the problem that involves the transverse of the spring that leads to a distance pulled of xm with the same applied force that stretches the spring the same distance. Is there something easy that i'm missing?