1. The problem statement, all variables and given/known data Practice problem for midterm. 2. Relevant equations T_1+U_1=T_2+U_2 U_spring=1/2kx^2 3. The attempt at a solution Set X-axis along the 30 degree line and the Y-axis perpendicular. I'm not sure how to consider the friction constant into the formula. Any help is very much appreciated.