Could someone please describe how ABS brakes work and what impact they have on forces on the car when braking.
2007-11-27 04:27:29 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Engineering
ABS brakes are controlled by the computer in your car so that when you break to hard they "tap the brakes" for you so that your wheels don't lock. If you did not have ABS and you slammed on your breaks you would stop the wheels from turning but the momentum of your car would overcome the coefficient of static friction that keeps your tires from sliding. The impact that ABS would have on the forces on the car when breaking would be simplified as it would be a series of forces acting against the direction of motion in the car. None of the forces would be equal to 1/2 of the momentum of the car. This is because the coefficient of static friction between tires and asphalt is about 0.5.
2007-11-27 04:48:06 · answer #1 · answered by meestaben 3 · 0⤊ 0⤋
There are two types of coefficients for friction: static and kinetic. The static coefficient is larger than the kinetic. This is evident as more force is needed to start to move an object than after it has started moving.
When you put on your breaks and the car wheels lock, the static coefficient of friction kicks in as the car is sliding. In a car with ABS, a microprocessor stops the breaking mechanism from locking the wheel as it opens and closes the valves to the breaks very rapidly. Under these circumstances, the wheel do not lock and the static coefficient of friction, which is greater than its kinetic counterpart, kicks into action. This is why the car stops faster than the conventional breaking systems, and the driver is still able to steer the car as needed (since the wheels are not locked).
2007-11-27 05:02:01 · answer #2 · answered by amirT 3 · 0⤊ 0⤋
ABS= Anti Lock Break System
Computer controlled system, it will adjust breaking/pressure on 4 wheels automatically, to prevent locking one wheel, which will cause , sliding on that wheel. It releases the break momentarily on the wheel that has the most pressure . And keep doing that rapidly for all 4 wheels. ABS reduces Force of Inertia acting on the car when breaking.
2007-11-27 04:40:56 · answer #3 · answered by iceman 7 · 0⤊ 0⤋