Energy Quiz 1 Corrections

Of the following units, the one that is a unit of energy is

• Newton
• Joule
• Meter
• Liter

A stationary object may have

• Potential energy
• Velocity
• Kinetic Energy
• Acceleration

Which is the best example that something has kinetic energy?

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

Conservation of energy means that

• energy can be created but not destroyed
• energy can be destroyed but not created
• energy can both be created and destroyed
• energy can neither be created nor destroyed

Calculate the potential energy of a 10 kg birdhouse at a height of 25 meters. (Use 10 N for gravity)

• 230 J
• 250 J
• 2500 J
• 1500 J

Calculate the potential energy of a 2 kg ball at a height of 10 meters. (Use 10 N for gravity)

• 20 J
• 2000 J
• 200 J
• 20000 J

What is the kinetic energy of a car which has a mass of 1000 kg and is moving at the rate of 20m/s?

• 200000 J
• 250000 J
• 200 J
• 2500 J

Calculate the kinetic energy of a running back that has a mass of 80 kg and is running at a velocity of 8 m/s.\

• 256 J
• 2560 J
• 25600 J
• 13000 J

Where is kinetic energy the greatest?

• a
• d
• g
• c

Where is potential energy the greatest?

• A
• D
• G
• F