Energy, Work, and Power

What are the two necessary conditions for work to be done?

• Force and Velocity

• Force and Displacement

• Force and Time

What is the unit for work?

• Joules

• Newton

• Watts

Which of the following illustration shows elastic potential energy?

• 
• 
• 

Which of the following statements show kinetic energy?

• The battery of a lit flashlight

• A golf ball placed at the edge of the hole

• A river flowing down a hill

Suppose a cart has a kinetic energy of 0.5 J. If you add enough mass to double the mass and make the cart go three times as fast, its kinetic energy is now ---.

• 6 J

• 3 J

• 18 J

• 9 J

Kinetic energy is associated with ---.

• speed

• position

• direction

• temperature

If there is no friction on this track, at which point would the coaster have the most kinetic energy?

• A

• B

• C

• D

Where is the roller coaster gaining potential energy?

• A to B

• B to C

• C to D

• The roller coaster is always losing potential energy

How high up is a 3200-kg plane if it has 960000 J of potential energy?

• 10 m

• 30 m

• 307200000 m

• 300 m

Energy of a rock perched on a cliff is an example of...

• gravitational
• elastic
• chemical
• kinetic