# How Is ABS Related To Newtons Laws?

Newtons laws have to do with motion and inertia. ABS brakes work to control frictional forces between the tire and the road. So essentially ABS and Newtons laws have nothing to do with each other. As long as you leave out friction then you can state a few things.

Possibly the first law could be considered: Every object in a state of uniform motion tends to remain in that state of motion unless an external force is applied to it.

ABS works by detecting that a tires rotation has slowed to a speed below that of the vehicals. An external force, that of the brake on that tire, has acted to slow the tire down too much and that tire is now skidding. In general a skidding tire does not supply as much deceleration to the car as would a non-skidding tire. So to maintain "Uniform motion" of that tire the ABS system will reduce the braking force on that tire.

You might also say that the third law: F=Ma also applies since the ABS computer is adjusting the braking force on the skidding wheel to keep the acceleration "a" of the car constant.

thanked the writer.