1. The problem statement, all variables and given/known data Here is the question I am having issues with.... Below are my questions regarding it. 2. Relevant equations 3. The attempt at a solution Now when looking at this, first I would assume I use conservation of momentum. (K + Ug + Us)i = (K + Ug + Us)f + Ff d Now for the first part (left side of the equation) my text says the following. 0 + 0 + 1/2Kx^2 I dont get that. So when its at the start, There is no Kinetic energy and no potential evergy, and for the spring energy its just 1/2Kx^2 ? I dont understand how to figure out the right side of that equation, and mainly finding the height, as outlined in the question. THanks!!