1. The problem statement, all variables and given/known data 2. Relevant equations Forces and/or energy 3. The attempt at a solution I honestly don't know where to start. First I tried kx = mgsin(tan-1 (3/4))) and got the answer E, which is wrong. Then I tried using energy, mgh = 1/2kx^2 which resulted in an answer that wasn't on the list. Any ideas on how to begin?