1. The problem statement, all variables and given/known data A 11 kg box slides 4.0 m down the frictionless ramp shown in the figure , then collides with a spring whose spring constant is 190 N/m. The angle of the ramp is 30°. What is the maximum compression of the spring? 2. Relevant equations Ei=mgh Ef=1/2kx^2 3. The attempt at a solution Ei=Ef mgh=1/2kx^2 mgLsinθ=1/2kx^2 11(9.8)(4sin30)=1/2(190)x^2 1.5m = Max compression I swear this is right but it's not, can anyone help me out?