Law of Conservation of Energy

The rock in the picture is pushed over the edge and it begins to fall. Which type of energy conversion is taking place?

• mechanical to heat

• sound to mechanical

• potential to kinetic

• kinetic to potential

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A ball is projected into the air. Where is potential energy the greatest?

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NGSS.MS-PS3-2

How does the mass of a bowling ball that has been rolled down the lane affect the kinetic energy?

• The kinetic energy does not depend on the mass of the bowling ball.

• The kinetic energy is increasing proportional to the mass of the bowling ball.

• The kinetic energy is decreasing proportional to the mass of the bowling ball.

• The kinetic energy is increasing proportional to the square of the mass of the bowling ball.

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NGSS.MS-PS3-1

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

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NGSS.MS-PS3-2

As a roller coaster goes downhill

• kinetic energy is converted into potential energy.

• potential energy is converted into kinetic energy.

• electrical energy is converted into potential energy.

• potential energy is converted into electrical energy.

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When gasoline is burned in a car engine, ________ energy is converted into _________ energy.

• heat, chemical

• chemical, potential

• mechanical, chemical

• chemical, mechanical

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Within the alarm clock seen here, energy is transformed. It is time to get up! The alarm clock goes off. What are the energy transformations taking place in your alarm clock?

• electrical to magnetic to sound

• electrical to mechanical to sound

• electrical to mechanical to light

• chemical to electrical to mechanical

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NGSS.MS-PS3-5

What energy transformations are occurring in this picture?

• gravitational potential --> sound --> thermal

• chemical potential --> mechanical --> elastic potential --> gravitational

• electrical --> sound --> thermal --> radiant

• chemical potential --> radiant --> thermal

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At which point would this roller coaster possess the most kinetic energy?

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• 2

• 3

• 4

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NGSS.MS-PS3-1

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At which point on this roller coaster would the amount of total energy equal the amount of potential energy?

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• 2

• 3

• 4

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NGSS.MS-PS3-2