1. The problem statement, all variables and given/known data "A bread truck is traveling at 18 m/s on a horizontal road. The brakes are applied and the truck skids to a stop in 3.6s. The coefficient of kinetic friction between the tires and the road is:" 2. Relevant equations Kinetic Friction = coefficient of kinetic friction x normal force 3. The attempt at a solution I'm not sure how you can manipulate velocity and time to get kinetic friction..