1.) Given: A 800 kg car is traveling over a hill with the shape of a parabola. When the car is at point A, its v = 9 m/s and a = 3 m/s?. (Neglect the size of the car.) %3D %3D Find: The resultant normal force and resultant frictional force exerted on the road at point A by the car. y 20 (1 - 6400 80 m

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Newton's First Law of Motion

If a very smooth ball is rolled down an inclined surface with zero friction, the ball will continue to roll indefinitely for an infinite time, in an attempt to reach to the same height on the opposite hill!