Physics Homework Solutions
Problem
#8820

Work to stop a car

At an accident scene on a level road, investigators measure a car's skid mark to be 88m long.  It was a rainy day and the coefficient of friction was estimated to be 0.42.  Use these data to determine the speed of the car when the driver slammed on (and locked) the brakes.  (Why does the car's mass not matter?)

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