8th EXAM - Kinetic and Potential Energy

Which is the best example that something has kinetic energy?

• a. a car parked on a steep hill 
• b. a tennis ball rolling across the court
• c. a picture hanging on the wall 
• d. a piece of coal before it's burned 

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How much potential energy is at the top of a hill on a rollar coaster ride

• 100%
• 50%
• 0%
• 20%

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As a pendulum swings from its highest to lowest position, what happens to its kinetic and potential energy? 

• Both the potential energy and kinetic energy decrease
• The potential energy decreases while the kinetic energy increases 
• The kinetic energy decreases while the potential energy increases 
• Bothe the potential energy and kinetic energy increase 

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The faster an object moves, the ________ kinetic energy it has. 

• more
• less
• none of the above
• all of the above 

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Gravitational potential energy depends on the ________ and ________ of the object. 

• Height and mass
• Friction and movement
• Mass and Movement
• Height and Friction 

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A ball will be rolled four times. In which of the following situations will some of the kinetic energy of the ball be converted into potential energy as the ball rolls?

• Situation A

• Situation B

• Situation C

• Situation D

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Label all points based the energy graph of a roller coaster

a

b

c

d

e

f

KE =PE (coaster going downhill)

Maximum Potential Energy

Least kinetic energy

Maximum Kinetic enegy

Least Potential Energy

KE = PE (coaster travelling up a hill)

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What is the Law of Conservation of Energy?

• Energy cannot be created, but can be destroyed as it transforms.

• Energy can be created and destroyed as it converts to other forms.

• Energy can be created and lost as heat as it converts to other forms.

• Energy cannot be created nor destroyed only transformed to other forms.

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Your lab partner tosses you a ball. As she throws the ball up in the air it follows this arc. Where is potential energy the greatest?

• Point A

• Point B

• Point C

• Point D

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This model shows a toy car on a ramp. Predict what action would increase the potential energy of the car.

• Use a longer ramp.

• Use a taller ramp.

• Use a shorter ramp.

• Add water to the ramp.

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