Find μs of the car. - A Car takes 10 seconds to accelerate to 80km before the driver shifts the car into neutral. - The cars mass = 1810kg - The car coats 0.9km before coming to a complete stop. - The total time = 86 seconds. Here is the work I have done. μs = ma/mg to find a V2 = V1 +at 22.2 = 0 +a10 a = 2.22m/s2 μs = 1810 * 2.22 / 1810 * 9.8 μs = 0.22 Does this make sense. This is the μs for the road right? How can I find it for the car? I figure I need to use the total distance it travel for something but I'm not sure how. Any help is welcome Thanks!