Conservation of Mechanical Energy

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

• A

• B

• C

• D

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NGSS.MS-PS3-1

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

On a roller coaster, where is maximum potential energy?

• At the bottom of a big hill

• When going around a corner

• When going upside down

• At the top of a big hill

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NGSS.MS-PS3-2

You drop a 5 kg ball from a height of 2 m. Just before it reaches the ground, how much kinetic energy does it have?

• 10 J

• 100 J

• 7 J

• 20 J

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NGSS.MS-PS3-1

NGSS.MS-PS3-5

The Law of Conservation of Energy states:

• Energy can created or destroyed but not transformed 

• Energy cannot be created or destroyed, it can only transformed

• Energy can't be created, destroyed or transformed

Tags

NGSS.MS-PS3-2

In the example of the weightlifter lifting a barbell, what is the final energy of the barbell?

• 2000 J

• 250 J

• 1500 J

• 1750 J

Tags

NGSS.MS-PS3-5

Which forces can change the total mechanical energy of an object?

• Both internal and external forces

• No forces can change the total mechanical energy

• External forces

• Internal forces

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NGSS.MS-PS3-1

NGSS.MS-PS3-2

NGSS.MS-PS3-5

When external forces do positive work on an object, what happens to its mechanical energy?

• Gains mechanical energy

• Loses mechanical energy

• Stays the same

• Becomes zero

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NGSS.MS-PS3-4

NGSS.MS-PS3-5

What form of energy does the car have at the end of the skidding scenario?

• All kinetic energy

• All potential energy

• Both kinetic and potential energy

• No energy

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

This drawing illustrates which of the following?

• Conservation of Mechanical Energy

• Conservation of Mass

• Conservation of Momentum

• Conservation of Matter

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NGSS.MS-PS3-2

NGSS.MS-PS3-5