Consider a car which weighs about 2000 kg and is parked at an elevation of 30 m above the bottom of a hill with a constant slope equal to -.5.
a) what is a horizontal component of the force on the car?
b) estimate the final kinetic energy which the car would have it its brakes gave away and it freely rolled down to the bottom the hill.
c) Estimate the final speed of the runaway car in both m/s and in mph units.