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Some skateboarders use a structure called a half-pipe, like the one shown, to perform impressive tricks. Which of the positions will provide a skateboarder with the GREATEST kinetic energy?

• 1

• 2

• 3

• 4

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Mechanical energy is the sum of two types of energy—kinetic energy and potential energy of position. Which of the following is an example of an object that has kinetic energy?

• a snail crawling across a leaf

• a computer monitor sitting on a desk

• a tightly wound spring in a windup toy

• a roller coaster car just before it goes downhill

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NGSS.MS-PS3-1

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The table shows the speed and height over time of a ball that starts at rest, then is dropped from the top of a building, which is 60 meters (m) tall. Use the table to answer any questions that follow.

At which time is the ball's potential energy at its maximum?

• 0.0 s

• 0.5 s

• 2.0 s

• 2.5 s

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NGSS.MS-PS3-2

The table shows the speed and height over time of a ball that starts at rest, then is dropped from the top of a building, which is 60 meters (m) tall. Use the table to answer any questions that follow.

At which time is the ball's kinetic energy at its maximum?

• 0.0 s

• 0.5 s

• 2.0 s

• 2.5 s

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

The diagram illustrates four phases of a model rocket's flight. Use the diagram to answer any questions that follow. When is the rocket's potential energy decreasing and its kinetic energy increasing?

• when the rocket's motor is burning and when the rocket is free falling

• when the rocket's motor is burning and when the rocket is ascending

• when the rocket is at the peak of flight, only

• when the rocket is free falling, only

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NGSS.MS-PS3-1

NGSS.MS-PS3-5

The diagram illustrates four phases of a model rocket's flight. Use the diagram to answer any questions that follow.

When is the rocket's potential energy increasing and its kinetic energy decreasing?

• when the rocket's motor is burning and when the rocket is free falling

• when the rocket's motor is burning and when the rocket is ascending

• when the rocket is at the peak of flight, only

• when the rocket is free falling, only

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NGSS.MS-PS3-1

NGSS.MS-PS3-2

NGSS.MS-PS3-5

What changes are taking place in the train’s potential and kinetic energy as it climbs the hill?

• The train’s potential energy is increasing, and its kinetic energy is increasing

• The train’s potential energy is increasing, and its kinetic energy is decreasing

• The train’s potential energy is decreasing, and its kinetic energy is increasing

• The train’s potential energy is decreasing, and its kinetic energy is decreasing

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NGSS.MS-PS3-1

NGSS.MS-PS3-2

NGSS.MS-PS3-4

The picture shows a train as it approaches a hill. This train can only make it over the hill if it approaches at its top speed because it will lose speed as it climbs.

What changes are taking place in the train’s potential and kinetic energy as it goes down the hill?

• The train’s potential energy is increasing, and its kinetic energy is increasing

• The train’s potential energy is increasing, and its kinetic energy is decreasing

• The train’s potential energy is decreasing, and its kinetic energy is increasing

• The train’s potential energy is decreasing, and its kinetic energy is decreasing

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NGSS.MS-PS3-2

NGSS.MS-PS3-5

What is happening to the ball's energy at a time of 1.5 seconds?

• The ball's kinetic energy is decreasing and its potential energy is decreasing

• The ball's kinetic energy is increasing and its potential energy is decreasing

• The ball's kinetic energy is decreasing and its potential energy is increasing

• The ball's kinetic energy is increasing and its potential energy is increasing

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NGSS.MS-PS3-1

NGSS.MS-PS3-5

The picture shows the path of a ball on a track. Use the picture to answer any questions that follow. Which series shows decreasing potential energy and increasing kinetic energy?

• T, Y, Z

• W, X, Y

• S, T, U

• V, X, Z

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NGSS.MS-PS3-1

NGSS.MS-PS3-5