What distinguishes the forces that act on a car driving over the top of a hill from those acting on a car driving through a dip in the road How the forces are related to the sensations experienced by passengers in the car during each situation?

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Chapter 5, Problem 14QAP

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What distinguishes the forces that act on a car driving over the top of a hill from those acting on a car driving through a dip in the road

How the forces are related to the sensations experienced by passengers in the car during each situation?

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