Conservation of Energy Lesson

The sum of potential energy and kinetic energy equals

• work

• transformation

• total energy

• mechanical energy

Click to look at the picture.
The picture is demonstrating an example of ______ . 

• gravity

• speed

• kinetic energy

• potential energy

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Click to look at the picture. 
The picture is an example of _____ .

• gravity

• potential energy

• kinetic energy

• friction

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____________ is the ability to do work or cause change.

• Energy

• Force

• Friction

• Motion

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What kind of energy is in a moving skateboard?

• Potential

• Kinetic

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Choose the best answer to match the description below.

Energy cannot be created or destroyed.

• Work

• law of conservation of energy

• mechanical energy

Answer explanation

Conservation = to preserve something. The law of conservation states that energy is always transferring, but it cannot be created or destroyed.

Tags

NGSS.MS-PS1-5

Energy is transferred from one form to another form.

• Work

• law of conservation of energy

• mechanical energy

Answer explanation

Conservation = to preserve something. The law of conservation states that energy is always transferring, but it cannot be created or destroyed.

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Looking at the pendulum model, fill in the blanks so the statement below is correct for the bob with the red circle around it. Assume the bob is moving to the right. At this point in the arc, the potential energy is at its _____ and the kinetic energy is at its_____

• maximum, maximum

• maximum, minimum

• minimum, minimum

• minimum, maximum

Answer explanation

Kinetic energy is at the lowest because it is at its highest point, while potential energy is at its max because it pauses there and then swings the other direction.

Tags

NGSS.MS-PS3-2

Looking at the pendulum model, fill in the blanks so the statement below is correct for the bob with the red circle around it. Assume the bob is moving to the right. At this point in the arc, the potential energy is at its _____ and the kinetic energy is at its_____

• maximum, maximum

• maximum, minimum

• minimum, minimum

• minimum, maximum

Answer explanation

Kinetic energy is at its lowest because it is as far right as it can go. Potential energy is at its max because the bob is pausing shortly and then swinging back left.

Tags

NGSS.MS-PS3-1

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Looking at the pendulum model, fill in the blanks so the statement below is correct for the bob with the red circle around it. Assume the bob is moving to the right. At this point in the arc, the potential energy is at its _____ and the kinetic energy is at its_____

• decreasing, decreasing

• decreasing, increasing

• increasing, increasing

• increasing, decreasing

Answer explanation

Kinetic energy is increasing because it is moving right and picking up speed , while potential energy is decreasing because the energy is being converted into kinetic energy as it picks up speed.

Tags

NGSS.MS-PS3-1

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