1. The problem statement, all variables and given/known data A truck of mass 8000 kg is accelerating at 5.0 m/s2 up a hill of inclination 4 degrees to the horizontal The friction forces on the truck add up to 5500 N. What force does the truck exert against the road in the direction of travel? What force does the road exert on the truck in the direction of travel? With the truck's engine working just as hard, what would be the acceleration of the truck down the hill? 2. Relevant equations F=ma 3. The attempt at a solution For the force the truck is exerting i used F=ma so F=(8000)(5)=40 000N I just don't believe it's that simple, do i need to break down the incline into x and y components? In which case I am not given enough information..