A delivery truck from the postal service is traveling with a constant velocity up and interstate entrance ramp with a 8.5 degree slope.a 60-kg box sits on the floor of the truck and as a result of static friction, it does not slide.
1. What is the work done on the box by the force of gravity? _______ J
2. What is the work done on the box by the force of friction? ________ J
3. What is the work done on the box by the normal force? ________ J
4. Through an interval in which the truck travels 365 m up the ramp entrance, what is the net work done on the box? _________J