1. The problem statement, all variables and given/known data The spring in the figure has a spring constant of 1400N/m . It is compressed 16.0cm , then launches a 200g block. The horizontal surface is frictionless, but the block's coefficient of kinetic friction on the incline is 0.210. FIGURE ATTACHED What distance d does the block sail through the air? Correct answer: 13.4 m 2. Relevant equations F(spring)=-kx F(friction)=μf*FN Work=Fdcos(θ) Work=(0.5mv22)-(0.5mv12) 3. The attempt at a solution F(spring)=(-1400 N/m)(0.16 m)= 224 N F(friction)=(0.210)(cos(45))(0.2)(9.8)= 0.29 N 224-0.29= 223.71 Work=223.71d Work=(0.5)(0.2)(?)-(0.5)(0.2)(?) I think that I should be finding the work and then find distance by dividing by the force. However, I'm not sure how to find the two velocities.