Hhm Unit 6 Energy

Jamie is on a roller coaster as Six Flags over Georgia. What is the energy transformation for the roller coaster as it rolls down the first giant hill?

• Kinetic Energy Increases Potential Energy Decreases

• Kinetic Energy Decreases Potential Energy Increases

• Kinetic Energy Remains the same and Potential Energy Increases

• Kinetic Energy Remains the same and Potential Energy Decreases

• Kinetic Energy Decreases and Potential Energy Remains the same

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Carly is practicing for the softball state championship game. She is throwing the softball straight up into the air and practicing catching the softball as it comes down. What is the energy transformation of the softball thrown vertically upward as it reaches its highest point?

• Kinetic Energy Increases Potential Energy Decreases

• Kinetic Energy Decreases Potential Energy Increases

• Kinetic Energy Remains the same and Potential Energy Increases

• Kinetic Energy Remains the same and Potential Energy Decreases

• Kinetic Energy Decreases and Potential Energy Remains the same

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A nuclear power plant generates electricity, which is then sent to our homes to power our many electrical devices, such as TV, refrigerator, and microwaves. This electrical energy is changed to electromagnetic and thermal energy in our microwaves. Which of the following statements must be true?

• The total amount of energy in the system changes as the energy form changes.

• Only the amount of electrical energy changes.

• Only the amount of electromagnetic energy changes.

• The total amount of energy in the system remains unchanged.

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There is a direct relationship between kinetic energy and potential energy. In which of the following scenarios is kinetic energy being converted to potential energy?

• A skier skis down a mountain.

• A car speeds up on a highway.

• A roller coaster goes up a hill and slows as it reaches the top.

• A ball is thrown across the field.

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NGSS.MS-PS3-5

A book falls from a shelf and hits the floor with a certain amount of kinetic energy. If the same book were to fall from a shelf twice as tall, how will the kinetic energy of the higher shelf, when the book impacts the floor, differ from the kinetic energy at impact from the lower shelf. Assume there is no loss of energy due to air friction/resistance?

• The kinetic energy will double.

• The kinetic energy will be one half as much.

• The kinetic energy will stay the same.

• The kinetic energy will quadruple.

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The ball above is seen from rest on the ground at starting point A. The ball was then launched along the indicated path shown by arrows. At which point does the ball possess its greatest potential energy?

• A

• B

• C

• D

• E

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1) A ball is launched along the path shown above, at which point does the ball possess it greatest amount of kinetic energy?

• A

• B

• C

• D

• E

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Potential energy can be classified either as gravitational, elastic, or chemical forms of energy. The form that is stored as a result of the objects ability to stretch or compress is classified as:

• Gravitational because gravity is stretching or compressing as gravity pulls down on the object.

• Elastic energy because it can be seen in things that stretch like rubber bands.

• Chemical energy due to the compressing of atoms into very tight spaces.

• All of the above represent that classification.

Gravitational Potential Energy is measured in Joules. How much gravitational potential energy does a 5.0 kg object have when it is 1.0 meters off the floor?

• 1.9 J

• 9.8 J

• 16 J

• 49 J

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NGSS.MS-PS3-2

A 6.0 kg dog named Kepler is sitting on the ground in the middle of a large grass yard. How much gravitational potential energy does Kepler have sitting there in the sun?

• 0 J

• 9.8 J

• 58 J

• 75 J

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