Work, Power, and Energy

Potential energy is transferred to kinetic energy as stationary objects begin to move.

• True

• False

• Only if power is done

As height increases, which of the following energy forms also increases?

• Gravitational

• Kinetic

• Elastic

• Chemical

In the above picture, a bungee jumper is standing on a platform above the ground and jumps off. Consider the system to be the jumper, the cord, and the earth. Which energy bar chart is most representative of his final position (B)?

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• 
• 
• 

As mass in a system increases, what happens to the amount of total energy in the system?

• Increases

• Decreases

• Stays the same

A boulder at the top of a cliff has 500 Joules of  potential energy. If it rolls off the cliff, how much kinetic energy will it have halfway through its fall?

• more than 500 J

• less than 500 J

• 250 joules of kinetic and 250 of gravitational potential

• zero Joules

At what point will the roller coaster have the least amount of GPE?

• W

• X

• Y

• Z

At what point will the roller coaster have the most amount of GPE?

• W

• X

• Y

• Z

At what point will the roller coaster have some GPE and some KE?

• W

• X

• Z

What type of energy is increased from position x to position y

• GPE

• KE

• Elastic

• Chemical

Pick the option that is an example of an open system.

• A fish tank with the lid on

• A fish tank with the lid off

• A car with the windows up

• A pot of water with the lid on