1. The problem statement, all variables and given/known data A crate, mass = 275 kg, sits at rest on a surface that is inclined at 20.0° above the horizontal. A horizontal force (parallel to the ground), F = 583 N is required to just start the crate moving down the incline. 2. The attempt at a solution U = (((mg sin (∅)) + (583 cos (70)) / (mg cos (∅)) I get .443, but the answer is .630. What am I doing wrong?