Okay so i'm having a little trouble explaining the answer to a phys lab question concerning rolling friction:
Assuming that f = µN , show that the coefficient of (rolling) friction for the car moving down the inclined plane with a constant speed is given by
µ = tanθ – (m₁ / m₂ cosθ).
(use symbols not numbers.)
What are m1 and m2?
Rolling friction has very little to do with the coefficient of friction between tires and the road. It is determined by tire air pressure and bearing and engine friction.