Energy quiz 2 (no thermal)

At which point is the potential energy the greatest?

• W

• X

• Y

• Z

_____________________ is the ability to perform work.

_____ is the unit of work.

• Joule

• Watt

• Amps

• Energy

_____ is the unit of Energy.

• Joule

• Watt

• Amps

• Energy

Amy uses a 20N force to push a lawn mower 10 meters. How much work does she do? (W=FD)

• 20 Joules

• 200 Joules

• 2 Joules

• No work

A 1 kg bird flies south at 4 m/s. What is its KE?

• 2 m/s

• 8 J

• 2 J

• 4 J

What would have the greatest kinetic energy?

• A car driving down a hill.
• A person running down a hill. 
• A ball rolling down a hill. 

Check off all the direct variables you need to find kinetic energy:

• Speed

• Distance

• Time

• Mass

When riding a roller coaster, you go up and down many hills. As you get to the top of a roller coaster, what energy transformation is taking place.

• Potential energy is changed into kinetic energy.
• Kinetic energy is changed into potential energy.
• Chemical energy is changed into heat energy.
• Heat energy is changed into chemical energy. 

Kinetic energy depends on the ________ and ________ of the object.

• Height (position)

• Mass

• Speed

• Friction