6. A skier starts from rest at the top of a frictionless incline of height 20 m. At the bottom of the incline, the skier encounters a horizontal surface where the coefficient of kinetic friction between the skis and snow is 0.210. a. How fast was the skier going at the bottom of the incline? Remember the incline was frictionless! b. How far does the skier travel on the horizontal surface before coming to rest? This is when the friction \"kicks in\". 7. A car of 1200 kg is travelling at 20 mIs when a deer runs into the street. The driver slams on the brakes and skids to a stop. a. How much kinetic energy does the car have before it hits the brakes? b. Where does this energy go when the driver skids to a stop? c. What is the work done by the friction generated between the tires and the road? d. If the car brakes over a distance of 50 m before coming to rest, what is the force of friction between the tires and the road? (ans: 4800 N)