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The driver of an 2000 kg car traveling at 20.0 m/s slams on the brakes, locking the wheels on the dry pavement. The coefficient of kinetic friction between rubber and dry concrete is typically 0.650.

a) Use the work-energy theorem to calculate how far the car will travel before stopping.

b) How far would the car travel if it were going twice as fast?

c) What happened to the car's original kinetic energy?

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