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Question:

physics of ABS (anti lock brakes) ? help?

Find the difference in stopping distance for an average car going at reasonable speed on snow with an anti-lock brake system over the same car going without an ABS ???you can assume numbers to explain the question, and formulas.

Answer:

THis is about the difference between static friction and sliding friction. Assume the car with ABS keeps the tires turning and the car without locks them up and skids. Since KE W FD, D will go as one over F THe Fs in the same ratio as the coefficients of friction, as g and the car's mass are constant
Brakes are waiting to end automobiles via friction between the tire and the roadway floor. before ABS, while the motive force pushed problematical on the brakes, the wheels truly locked. while the tire can grant the comparable floor to the line (via fact it is not turning,) warmth builds up and the rubber truly starts off to soften. The melted rubber makes little balls and liquifies. The little balls and the liquid rubber grant lubricants so as that there is a few distance much less friction attainable to end the automobile. The ABS device senses while the wheel locks up and releases the destroy for an on the spot so the wheel and tire can turn offering a clean, much less warm tire with greater useful friction to the roadway. that's exciting that interior the old days good drivers discovered to try this comparable ingredient, in spite of if admittedly not just about as quickly as ABS systems can. Now, i'm instructed in case you employ the old technique with ABS brakes, that's certainly much less valuable at combating, you're truly meant to push the brake so some distance because it is going and shop it down, some thing that still feels completely alien to many people. i've got secure below a url the place they provide a effective step by utilising step explanation of ways ABS brakes paintings.

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