4. The parking brake fails on a parked car at the top of a hill and it rolls down the hill ¹. Atthat same moment an SUV is coming down a cross street at the bottom of the hill,moving at 30 miles per hour. (See diagram below.) The mass of the car is 1000 kg. Themass of the SUV is 3000 kg.a) Find the speed of the car when it reaches the bottom of the hill.b) The car and SUV collide and move off together. Find their velocity immediately afterthe collision.¹ Note that the wheels of a car are so much lighter than the car itself that their rotation is negligible. In short, arolling car acts like a sliding object, not like a rolling object.W.View from AboveNEHillSide View ofthe Hill10m40°

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Answered: 4. The parking brake fails on a parked…

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