1. The problem statement, all variables and given/known data You are pushing a 53 kg crate at a constant velocity up a ramp onto a truck. The ramp makes an angle of 22 degrees with the horizontal. If your applied force is 373 N, what is the coefficient of friction between the crate and the ramp? 2. Relevant equations μ = Ff/Fn Fn = m X g X cos θ Fnet = Fa – mg sin θ +or- μmg cos θ 3. The attempt at a solution Fn = 53 X 9.81 X cos 22 Fnet = 373 – 53 X 9.81 sin 22 + μ X 53 X 9.81 cos 22 The book's answer is 0.37 but I just can't get the rest of the equation. Any suggestions are appreciated.