3. A car is parked on a hill. The gravitational force on the car is 9.31 X 103 N straight downward, and the angle of the hill is 4 from the horizontal. The car's brakes fail, and the car slides 30.0 m downhill. a) Calculate the component of the gravitational force that acts parallel to the 93] X 10'- N car's motion. _____________________________ car slides 30.0 m ( I 2 marks) b) Calculate the work done on the car by gravity as the car slides. ( f 2 marks)