How can you relate Anti Lock Breaking system with the static and dynamic friction?
The purpose of the ABS is to keep the wheels rolling while reducing speed, so the vehicle can maintain directional control. In each wheel, there are two friction forces to evaluate: (1) Brake friction, between the brake pads or shoes and discs or drums, respectively (2) Tire friction, between the tire and road surface. If the force due to brake friction is greater than the tire friction, the wheel stops rotating, and begins skidding. When the tire is rotating, you have dynamic (or rolling) friction on the tire. When it stops rotating, you have only static friction. On a dry road with ideal driving conditions, static friction will probably be greater than dynamic friction, hence the “skidding to a stop” works well. On a wet road, the static coefficient of friction is much lower, and skidding produces undesirable results. The ABS gives up the possible benefit of static friction (skidding to a stop on dry roads) by always forcing the braking system to operate in the regime of dynamic (rol
