When a car slams on its brakes and starts to skid, it leaves skid maks on the road Investigators use these marks to determine how fast a car was going when it started to brake. The cars speed, v, in feet per second is related to the skid mark lengeth, d, by the equation shere f is the coefficient of fiction determined by the maternial the car was skidding on Wet asphalt has a coeficient of fnction of 05 itacar was driving 70 feet per second and slams on its trakes, how long is the skid mark?
