Burning rubber

You're quietly sitting by a street one day, enjoying the sun, when you notice a speeding car traveling at 20 m/s down the street. The driver notices that there's a stop sign in the street and hits the brakes 40 m before the stop sign, coming to a stop right at the sign itself. What is the coefficient of friction between the car's tires and the road?

Details and assumptions

  • Assume that once the driver hits the brakes the wheels no longer turn but instead slide against the road.
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