Car travels up 10% grade at constant speed of 35 m/s. The car is 2000 kg and requires a total force of 600N on a regular, flat incline. What is the power required to get up the grade? P=FxV %10 percent incline = arctan(.1)... theta = 5.7, so the displacement would be about 10.1 (depending how you treat the grade). Then I plugged into the equation P = Fcos(theta)(displacement)(velocity).... This does not yield the correct answer!!! It's got to be how I'm dealing with the grade. I'm not sure what to do with it. Any hints?