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?
μ = Ff/Fn
Fn = m X g X cos θ
Fnet = Fa – mg sin θ +or- μmg cos θ
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.