1. The problem statement, all variables and given/known data Car is driving up a slope, 16o to the horizontal, trying to accelerate as much as possible. Static friction coefficient = 0.9. Kinetic Friction coefficient = 0.8. Find the magnitude of the maximum possible acceleration (assuming a powerful enough engine). 2. Relevant equations F=ma F(friction) = (static friction coefficient) x Normal force Normal force = mgcos(16) 3. The attempt at a solution I drew a force diagram and worked out the Engine force required to overcome the gravity and friction forces and keep the car in constant velocity: No mass is given so i canceled out the masses and found acc. to be 11.2 m/s-2. I used the static friction coefficient because I was told that the wheels have to be skidding for me to use the kinetic friction coefficient. Can anybody help me with this question? I have a value for acceleration but I think I am doing something wrong, otherwise the question wouldn't ask for a maximum value.