Question

A driver makes an emergency stop and inadvertently locks up the brakes of the car, which sklds to a stop on dry concrete. Conslder the effect of rain on this scenario. If the coefficlents of kinetic friction for rubber on dry and wet concrete are μκ(dry) = 0.84 and μκ(wet) = 0.58, how much farther would the car skid (expressed in percentage of the dry-weather skid) if the concrete were instead wet? Axwes 448276 Axdry

Answer 1

Delta x_wet / Delta x_dry = u_K(dry) /u_K(wet) - 100

= 0.84/0.58*100 - 100

= 44.83 %