1. The problem statement, all variables and given/known data A car of mass m accelerates from speed v1 to speed v2 while going up a slope that makes an angle θ with the horizontal. The coefficient of static friction is μs, and the acceleration due to gravity is g. Find the total work W done on the car by the external forces. 2. Relevant equations Wnet = .5mv22 - .5mv12 W=F*d W=|F|*|d|*cos(theta) d=displacement 3. The attempt at a solution The question actually does say it gives me static friction, not sure how that works since it's a kinetic energy question and must be in motion. I know the motion is up a ramp, but not quite comprehending how the angle (theta) will affect the various components in this work-energy example. Answer is algebraic, in terms of any of the following: [v1,v2,(theta),us,g] Please help! Edit: I do know that Fnet = deltaK/d as well. Not sure if that helps me though.