A person drives a motorcycle with constant speen of 13.5 m/s around the inside of a vertical circular track of radius 3.2 m. If the combined mass of the motorcycle and rider is m, calculate the normal force exerted on the motorcycle by the track at the top and bottom in terms of the combined mass 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!