Energy Review

Based on the diagram of a ball rolling down hill, what statement is true?

• The ball in box C has less kinetic energy than the ball in box B.

• The ball in box A has more kinetic energy than the ball in box B.

• The ball in box C has more potential energy than the ball in box B.

• The ball in box C has less potential energy than the ball in box B.

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This graph MOST LIKELY describes the potential energy and kinetic energy of a roller coaster going

• up a hill

• down a hill

• up a hill and then rolling back down the other side

• down a hill and then rolling back up the other side

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Which point on the roller coaster's path represents the maximum potential energy?

• A

• B

• C

• D

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How would you describe the relationship between the mass of a car and its kinetic energy?

• As the mass of a car increases, its kinetic energy increases.

• As the mass of a car increases, its kinetic energy decreases.

• As the mass of a car decreases, its kinetic energy increases.

• There is no clear relationship between mass and kinetic energy.

  Eliminate

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The Hoover Dam in Nevada, supplied by Lake Mead, generates hydroelectric power for several western states, including the numerous lights in Las Vegas. What statement accurately explains the potential energy that Hoover Dam uses to generate this power?

• The large number of generators and height of the dam account for the potential energy.

• The depth of Lake Mead and the large number of generators account for the potential energy.

• The amount of water released through the dam and the dam's height account for the potential energy.

• The quantity of water flowing into Lake Mead from the Colorado River accounts for the potential energy.

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Which point on the pendulum's swing represents the minimum potential energy?

• A

• B

• C

• A and C

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If your friend said that kinetic energy was changing to potential energy at point C, how would you respond?

• Your friend is correct.

• Your friend is incorrect, at this point, the cannon ball just has kinetic energy.

• Your friend is incorrect, at this point, the cannon ball just has potential energy.

• Your friend is incorrect, at this point, the cannon ball is converting kinetic to potential energy.

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Energy can be changed from one form to another. Changes in the form of energy are called energy conversions. In an automobile engine, fuel is burned to convert ________energy into heat energy. The ________energy is then changed into ________energy.

• heat → chemical → mechanical

• chemical → mechanical → heat

• mechanical → heat → chemical

• chemical → heat → mechanical

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The light bulb converts electrical energy into light and _________ energy.

• chemical

• electromagnetic

• heat

• nuclear

Electrical energy can be transformed into other types of energy. We often experience this transformation of energy in our everyday lives. In one example the intended energy transformation produces thermal energy. That is the

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