14. You are driving your new car 14.0 m/s east when you slam on your brakes to avoid having your first collision. The force of friction on your car tires is 1.50 kN and the combined mass of you and your car is 1200 kg. Determine the a. direction of the frictional force causing your car to slow. [Appendix A] b. distance you skid before coming to a stop. [78.4 m] 15. An official NHL hockey puck must have a mass between 156 g and 170 g. Your hockey puck has a mass of 170 g and is shot north along the ice at 3.0 m/s. If after travelling 8.0 m the puck comes to rest, determine the force of friction that acted on the puck. [0.096 N, south] 16. A 2.6 kg sled is pulled along a horizontal surface at a constant velocity to the south. If the coefficient of kinetic friction between the surfaces is 0.17, determine the force of friction acting on the sled. [4.3 N, north] 17. Due to a frictional force of 3.30 N, a 20 kg curling rock slides to rest along a horizontal sheet of ice. Calculate the coefficient of kinetic friction between the curling rock and the ice. [0.017] Copyright @ Resource De