1. The problem statement, all variables and given/known data The spring in the figure has a spring constant of 1000 N/m. It is compressed 13.0 cm, then launches a 200 g block. The horizontal surface is frictionless, but the block's coefficient of kinetic friction on the incline is 0.220. What distance does the block sail through the air? 2. Relevant equations .5(k)(x^2) .5(m)(V^2) Wnc=Ef-Ei 3. The attempt at a solution I think I'm pretty close to solving this problem but I'm messing up somewhere... I know I need to find the final velocity of the mass right when it gets to the top of the incline so I'm gonna use Wnc=Ef-Ei. (To find Ei I used potential energy of a spring formula .5(k)(x^2). So... -μk(cosθ)(m)(g)(L)=.5(m)(Vf^2)+(m)(g)(h)-.5(k)(x^2) The distance the mass traveled up the incline is L so L=2/sin45 -.22(cos45)(.2)(9.8)(2/sin45)=.5(.2)(Vf^2)+.2(9.8)(2)-.5(1000)(.13^2) I get that Vf=1.38m/s To find the distance I simply use R=Vf^2/g and get .19 but it's wrong? Can someone help me out!?!?!