Hello PF, I need help with a physics question. A curve of radius 61 is banked for a design speed of 89 . If the coefficient of static friction is 0.32 (wet pavement), at what range of speeds can a car safely make the curve? [Hint: Consider the direction of the friction force when the car goes too slow or too fast.] A curve of radius 61 is banked for a design speed of 89 . How would you find its range? I guess we could find a velocity, but it wouldnt be the the final velocity or the initial velocity?