A Person Stands on the Edge of a Cliff

question 46

Multiple Choice

A person stands on the edge of a cliff.She throws three identical rocks with the same speed.Rock X is thrown vertically upward,rock Y is thrown horizontally,and rock Z is thrown vertically downward.If the ground at the base of the cliff is level,which rock hits the ground with the greatest speed if there is no air resistance?

• A)Rock X
• B)Rock Y
• C)Rock Z
• D)They all hit the ground with the same speed.

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Definitions:

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Reluctant Patient

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