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Wapapow10
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Homework Statement
A driver makes an emergency stop and inadvertently locks up the brakes of the car, which skids to a stop on dry concrete. Consider the effect of rain on this scenario. If the coefficients of kinetic friction for rubber on dry and wet concrete areμK(dry) = 0.81 and μK(wet) = 0.53,
how much farther would the car skid (expressed in percentage of the dry-weather skid) if the concrete were instead wet?
Homework Equations
The Attempt at a Solution
F=uk*g
F=.81*9.8
F=7.93
F=.53*9.8
F=5.19
5.19/7.93=65.44%
Got this wrong and I'm not sure what I'm missing[/B]