A student is pushing a crate up a 20 degree incline. The crate has a mass of 20 kilogram, and the coefficient of friction between the crate and the incline is 0.25.
(a) Draw a free-body diagram of the crate.
(b) Find the magnitude of the normal force between crate and incline.
(c) Find the magnitude of the friction force between the crate and the floor.