1. The problem statement, all variables and given/known data A 1500kg rocket is to be launched with an initial upward velocity of 50m/s. In order to assist its engines, engineers will start it from rest on a ramp that rises 53 degrees from the horizontal. At the bottom, the ramp turns upward and launches the rocket vertically. The engines provide a constant forward thrust of 2000 N, and friction with the ramp is a constant 500 N. How far from the base of the ramp should the rocket start, as measured along the surface of the ramp? 2. Relevant equations E0 +Win = Ef + Elost U = mgh KE = 1/2 m v2 3. The attempt at a solution I need to find the displacement along the ramp. I made the change in x the surface of the ramp, and I made h equal x*sin 53. Solving for x, I got 141.6m.