A Rock Falls from a Vertical Cliff That Is 4

question 25

Multiple Choice

A rock falls from a vertical cliff that is 4.0 m tall and experiences no significant air resistance as it falls.At what speed will its gravitational potential energy (relative to the base of the cliff) be equal to its kinetic energy?

• A)3.1 m/s
• B)4.4 m/s
• C)6.3 m/s
• D)8.9 m/s
• E)13 m/s

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Definitions:

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Hormone, produced by the pancreas, that stimulates the liver to break down glycogen, thus raising blood glucose levels.

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Storage polysaccharide found in animals; composed of glucose molecules joined in a linear fashion but having numerous branches.

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A steroid hormone that plays a key role in the development of male reproductive tissues, as well as promoting secondary sexual characteristics such as increased muscle and bone mass.