A policeman investigating an accident measures the skid, Physics

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A policeman investigating an accident measures the skid

A policeman investigating an accident measures the skid marks left by a car. The distance between the point that the driver slammed on the brakes and the point where the car came to a stop was 56.0 m. The coefficient of kinetic friction between the tires and the road was 0.150. How fast was the car going when the driver applied the brakes?

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