Suppose a car approaches a hill and has an initial speed of 118 km/h at the bottom of the hill. The driver takes her foot off of the gas pedal and allows the car to coast up the hill. 4 33% Part (a) If the car has the initial speed stated at a height of h = 0, how high, in meters, can the car coast up a hill if work done by friction is negligible? A 33%
Part (b) If, in actuality, a 790-kg car with an initial speed of 118 km/h is observed to coast up a hill and stops at a height 20.5 m above its starting point, how much thermal energy was generated by friction in J? A 33%
Part (c) What is the magnitude of the average force of friction, in newtons, if the hill has a slope 2.1° above the horizontal?