1. The problem statement, all variables and given/known data A 3kg mass starts at rest and slides a distance d down a smooth 30deg incline, where it contacts an unstressed spring. It slides an additional 0.2 m as it is brought momentarily to rest by compressing the spring (k=400N/m) What is the initial separation d between the mass and the spring? 2. Relevant equations F=ma Vf = Vi + at Us = 1/2kx^2 Ug = mgh K = 1/2mv^2 3. The attempt at a solution I'm not sure how to approach this problem yet. I know that you need to find the Vf, using mgsin30 as the acceleration and Vi=0.