We can write the static friction force as Anti-lock brakesystems in cars (ABS) w

Question

We can write the static friction force as Anti-lock brakesystems in cars (ABS) work by not

allowing the tire to “lock-up” and slidewithout turning. Which of the following statementsis true?

A) the coefficient of rolling friction is less than thecoefficient of sliding friction

B) the coefficient of sliding friction is less than thecoefficient of rolling friction

C) the coefficient of rolling friction and the coefficient ofsliding friction are the same

Can someone explain what the answer is and why? I'll be sure torate.

Explanation / Answer

ABS brakes are used because it isbetter to try to stop the car with the wheels turning than withjust sliding on the ice. Therefore, the greater stopping powerbelongs to the one with the greater coefficient of friction. Therefore, the answer is B, the coefficient of sliding friction isless than the coefficient of rolling friction

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