Energy and Energy Transformations Quiz

What is potential energy?

• Energy of motion

• Energy stored in an object

• Energy transferred into the ground

• Energy that causes sound

If you lift a book into the air, what happens to its potential energy and total energy?

• Both decrease

• Potential energy increases, total energy remains the same

• Both increase

• Potential energy decreases, total energy remains the same

When a book is falling, when is its kinetic energy the highest?

• When it starts to fall

• Halfway through the fall

• Right before it hits the ground

• After it hits the ground

What happens to the energy in the book once it hits the ground?

• It remains as kinetic energy

• It disappears

• It is transferred into the ground and surrounding air as sound and heat energy

• It increases the potential energy of the ground

In a hydroelectric dam, what is the sequence of energy transformations?

• Electrical, kinetic, thermal

• Gravitational, kinetic, kinetic, electrical

• Nuclear, thermal, kinetic, electrical

• Kinetic, kinetic, electrical

What is the potential energy of a 0.5 kg ball thrown 20 meters into the air?

• 200 joules

• 50 joules

• 100 joules

• 10 joules

What is the Law of Conservation of Energy?

• Energy can be created and destroyed

• Energy can only be transformed from one type to another

• Energy is always lost as heat

• Energy cannot be transferred to the surroundings

What is mechanical energy?

What is the SI unit for energy?

• Newton

• Joule

• Watt

• Volt

Which has a greater effect on an object's kinetic energy?

• Mass

• Velocity

• Height

• Gravity