Energy Unit Review

If all of the following objects are moving at the same velocity, what is the correct order for them from least kinetic energy at the top to most kinetic energy on the bottom?

1 - Bowling Ball

2 - Wrecking Ball

3 - Ping Pong Ball

4 - Cotton ball

5 - Baseball

• 4,3,5,1,2

• 2,1,5,3,4

• 3,4,1,5,2

• 4,3,2,5,1

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If a girl holds a ball at waist level and then lifts the ball above her head and holds it there, which of the following is she doing?

• increasing the ball's kinetic energy

• increasing the ball's stored energy

• decreasing the ball's potential energy

• decreasing the ball's magnetic energy

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Look at the picture of a ball bouncing. Which of the following best illustrates that energy has been transferred to the ball?

• the ball dropping

• the ball bouncing up again

• the ball compacting as it hits the ground

• the ball being held before being dropped

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If you were shooting a bow and arrow, which of the following steps would produce the most elastic energy? HINT: There are two answers!

• bending the bow

• aiming the arrow

• loading the arrow

• pulling the string back

• releasing the arrow

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NGSS.MS-PS3-5

What is the correct label for the position with the rectangular box on the track shown below?

• Maximum Kinetic Energy

• Minimum Kinetic Energy

• Maximum Potential Energy

• Minimum Potential Energy

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Each figure below shows a force measured in Newtons pushing on a block. If there are no other forces pushing on the block, in which case is the acceleration of the block the greatest?

• A

• B

• C

• D

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An archer loads an arrow into his bow, pulls the string and shoots at a target. When does the arrow have the most elastic potential energy?

• elastic potential energy remains constant

• a fraction of a second after he releases the string and the arrow starts moving

• before he pulls the string back

• when the string is pulled all the way back

• just before the arrow hits the target

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NGSS.MS-PS3-2

Mack the mountain man is an avid outdoorsman. What would be the correct ranking for Mack's gravitational potential energy from lowest to highest with the lowest amount on top? All of the activities occur on the same mountain.

1 - Playing banjo while dancing 500 meters from the mountain's base

2 - Napping at the very top of the mountain

3 - Chopping wood 200 meters above the mountain's base

4 - Driving horses at the bottom of the mountain

5 - climbing up a cliff 50 meters above the mountain's base

• 4, 5, 3, 1, 2

• 5,4,1,2,3

• 2,1,3,5,4

• 2,3,4,1,5

What are some things that can give or take away the kinetic energy of a sailboat? Select all that apply.

• Wind

• Water Currents

• Making a hard turn

• Collision with another boat

• Wearing stylish sunglasses

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Which of the following graphs could represent the gravitational potential energy on the y-axis vs. the altitude (this means height) on the x-axis of a gondola as it travels up a mountain?

• A

• B

• C

• D

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