A 100kg box slides down a ramp that has 60.0degrees slope. The coefficient of kinetic friction between the box and the ramp is 0.250. The box slides a distance of 36.0m.
1) What is the work done by the gravitational force?
2) What is the work done by the frictional force?
3) What is the work done by the normal force?
4) If the box started at rest, what is its velocity after sliding 36.0m?