I have read about the motion of a car on a banked road.
I read that the maximum possible speed of a car on a banked road is greater than that on a flat road. I know the formula for finding velocity in each case. But I am unable to figure out the reason by comparing the equations.
I read about the ideal speed when the frictional force is zero. I cannot understand how can the speed determine the frictional force. Frictional force should only depend on the nature of surfaces in contact. How is it possible that at a certain speed the frictional force is zero?
Also I cannot understand that if the velocity is greater than the ideal velocity, then what will be the change in the motion of the car?