All current car are required to have an Anti-Lock Brake System (ABS). This keeps

Question

All current car are required to have an Anti-Lock Brake System (ABS). This keeps the wheels turning even in a panic stop so the wheels never slide. A car with ABS slams on its brakes in a panic stop and does not slide sideways (ABS also helps reduce the tendency of some cars to rotate sideways in a panic stop). The car has a mass of [2000:kg] 2000kg and is being operated on a dry concrete roadway. How large is the friction force while the car is still moving?

a. 14,000 N

b. 1,400 N

c. 20,000 N

d. 2,000 N

Explanation / Answer

According to the problem given ,

Since the functionality of ABS is to ensure perfect rolling motion, that means the car wheels will not slide, Hence the only frcitonal force existing is the static frction between the wheels and ground at the point of contact of each wheel,

f = usmg

f = 1*2000*10 = 20,000 [C]

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