Harnessing Human Energy -Chapter 1 Review

Which object has kinetic energy?

• A ball held in a baseball glove.

• A ball buried under the ground.

• A ball sitting on a table.

• A ball moving through the air.

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NGSS.MS-PS3-1

A plane with a mass of 6,800 kg is moving at a speed of 55.0 m/s. What is the kinetic energy of the plane?

• 20,600,000 J.

• 10,285,000 J.

• 374,000 J.

• 187,000 J.

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NGSS.MS-PS3-1

Which variables affect the kinetic energy of an object?

• Acceleration.

• Speed.

• Mass.

• Volume.

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NGSS.MS-PS3-1

What is the kinetic energy of a 0.500 kg toy car moving at a speed of 1.50 m/s?

• 1.13 J.

• 2.25 J.

• 0.563 J.

• 0.167 J.

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NGSS.MS-PS3-1

A scientist conducts a test to determine how best to increase the kinetic energy of a moving ball. Which change would add the most energy?

• Doubling the speed of the ball.

• Tripling the mass of the ball.

• Tripling the speed of the ball.

• Doubling the mass of the ball.

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NGSS.MS-PS3-1

When a book falls from a shelf, its kinetic energy _______ because its velocity _______.

• decreases; decreases

• decreases; increases

• increases

  decreases;

• increases

  increases;

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NGSS.MS-PS3-1

NGSS.MS-PS3-5

Which action will decrease the kinetic energy of a train?

• Adding more cars to the train.

• Decreasing the temperature of the train.

• Adding passengers to the train.

• Decreasing the speed of the train.

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NGSS.MS-PS3-1

NGSS.MS-PS3-5

Decreasing the speed of the train.

• A basketball falling toward the ground.

• A basketball rolling on the ground.

• A basketball sitting on the ground.

• A basketball sitting on a high shelf.

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NGSS.MS-PS3-1

NGSS.MS-PS3-5

A 0.145 kg baseball is flying at a height of 2.50 m. How much potential energy does the ball have?

• 1.01 J.

• 0.36 J.

• 7.10 J.

• 3.55 J.

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NGSS.MS-PS3-2

Which objects have potential energy?

Choose all that apply:

• A spring that is sitting on a shelf.

• A spring that is compressed.

• A spring that is lying on the ground.

• A spring that is stretched.

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NGSS.MS-PS3-2