Find the normal force exerted by a seat on a person riding the Colossus halfway between the top and bottom of the ride. Are the normal forces that you found above all equal? Explain why or why not. When the person is at the halfway point described in part (c), which force points toward the center of their circular path?

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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!