Types of Energy

Chapter 9

What is Energy?

Energy is the ability to do work.

What is Energy?

When one object does work on another, energy is transferred from the first object to the second object.

What is Energy?

The metric unit for energy is the joule (J).

Mechanical• Deals with motion• Include kinetic and

potential• Ex. fan, sound, moving

air

Mechanical

Electromagnetic

• Caused by moving electrons (negative particles)

• Includes the EM spectrum• Ex. electricity, magnets,

light, x-ray, etc.

Electromagnetic

Thermal

Means “Heat”Caused by moving

particles (kinetic energy)

Thermal

Chemical

Holds atoms together to form chemical bonds

Ex food, batteries, fuel

Chemical

Nuclear

Found within the nucleus of an atom

Extremely strong Used to create nuclear

power or nuclear weapons.

Nuclear

Law of Conservation of Energy

• States “Energy can not be created nor destroyed.”

• Energy simply changes types (forms)

Law of Conservation of Energy

• In a system the energy in must equal the energy out

• Energy In = Energy Out

Law of Conservation of Energy

Energy In = Energy Out• EM • Thermal (heat)

• Mechanical (moving air & sound)

Law of Conservation of Energy

Energy In = Energy Out• Chemical

(wood)• Thermal (heat)

• EM (light)

•Mechanical (sound)

Law of Conservation of Energy

Energy In = Energy Out• EM (electricity)

• EM (Light)

•Thermal (heat)

Law of Conservation of Energy

Energy In = Energy Out• Chemical • EM (electricity)

Law of Conservation of Energy

Energy In = Energy Out• Chemical (gasoline & battery)

• Mechanical (motion)

•Thermal (heat from friction)

Law of Conservation of Energy

Energy In = Energy Out• Chemical

(food)• Mechanical (movement)

• Thermal

Law of Conservation of Energy

Energy In = Energy Out• Chemical (battery)

• Mechanical (sound)

•EM (light)