Energy and Their Conservation

At which point(s) on the roller coaster is the gravitational potential energy at its maximum?

• A
• B
• C
• D

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NGSS.MS-PS3-2

At which point(s) on the roller coaster is the kinetic energy at its maximum?

• A
• B
• C
• D

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In diagram 2, if the mass of the car is 600 kg, what is the change in potential energy from point A to point B?

• 411,600 J
• 294,000
• 176,400 J
• 117,600 J

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NGSS.MS-PS2-4

In diagram 2, if the 600 kg cart is initially at rest, what is its velocity at point B?

• 19.8 m/s
• 15.0 m/s
• 10.3 m/s
• 3.8 m/s

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NGSS.MS-PS2-2

NGSS.MS-PS3-1

NGSS.MS-PS3-4

1. A ball has a 17 J of kinetic energy and its mechanical energy is 25 J. If the ball has a mass of 3.2 kg, what is its height above the ground?

• 0.26 m

• 0.52 m

• 5.2 m

• 25 m

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NGSS.MS-PS3-4

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What is mechanical energy?

• It is what metal creates when heated.
• All potential and kinetic energy in a system.
• It is motion of all matter.
• Energy of momentum.

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What does the Law of Conservation of Energy state?

• Energy cannot be created or destroyed
• Nothing can exchange energy
• Energy will increase over time.
• Energy will decrease over time.

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NGSS.MS-PS3-5

Energy of motion is which type of energy?

• Potential
• Kinetic
• Sound
• Gravitational

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NGSS.MS-PS3-1

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What type of energy is in this picture?

• Kinetic
• Potential
• Chemical
• Sound

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NGSS.MS-PS3-1

NGSS.MS-PS3-5

Work is:

• A transfer of energy by a force to move and object
• Something you get paid for
• Something you take home
• Makes you sweat

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NGSS.MS-PS3-5