unit 26 types of energy

Unit 26

Types of Energy

Energy can neither be created nor destroyed. Energy changes from one kind to another.

The total energy of an object never changes.

Anything that has mass and movement has kinetic energy.

The kinetic energy of an object in this case is given by the relation:

KE = (1/2)mv2

m=mass of the object

V=velocity of the object

The greater the mass or velocity of a moving object, the more kinetic energy it has.

The greater the mass or velocity of a moving object, the more kinetic energy it has.

Potential energy is the energy stored in a system. It is the energy that can be released to become kinetic or another form.

PE = mgh

 PE = Energy (in Joules)

m = mass (in kilograms)

g = gravitational acceleration of the earth (9.8 m/sec2)

h = height above earth's surface (in meters)

Mechanical energy is also the total amount of kinetic and potential energy

in a system.

Wind-up toys, grandfather clocks, and pogo sticks are examples of

mechanical energy. Wind power uses mechanical energy to help create

electricity.

Potential energy + Kinetic energy =

Mechanical energy

Mechanical Energy Summary

Mechanical Energy

Potential Energy

Gravitational PE mgh

Elastic PEEnergy that is stretched or compressed.

Kinetic Energy The energy of motion

What is Electromagnetic Energy?

Radio WavesMicrowavesInfraredVisible LightUltravioletX-raysGamma Rays

What is Electrical Energy?• Energy caused by the movement of electrons

• Easily transported through power lines and converted into other forms of energy

What is Chemical Energy? Energy that is available for release from chemical reactions.

The chemical bonds in a matchstick store energy that is transformed into thermal energy and electromagnetic energy when the match is struck.

Examples of Stored Chemical Energy

Nuclear energy is the energy stored in the nucleus of an atom.

What is Nuclear Energy?

Summary of Energy-Part 1

Mechanical Energy• Energy of Motion and Position of

everyday objects.

Electrical Energy• The energy associated with electric

charges.

Chemical Energy• Energy stored in chemical bonds.

Summary of Energy-Part 2

Electromagnetic Energy• Energy that travels through space in the

form of waves.

Nuclear Energy• The energy stored in atomic nuclei

Thermal Energy• Heat Energy.

QUIZ TIME!What type of energy cooks food in a microwave oven?

What type of energy is the spinning plate inside of a microwave oven?

QUIZ TIME!Electrical energy is transported to your house through power lines.

When you plug an electric fan to a power outlet, electrical energy is transform into what type of energy?

QUIZ TIME!

What energy transformation occurs

when an electric lamp is turned on?

ELECTRICAL ENERGY

What types of energy are shown below?

What types of energy are shown below?

Potential

What type of energy is shown below?

What type of energy is shown below?

Chemical

What types of energy are shown below?

What types of energy are shown below?

Electromagnetic(infrared with the remote and visible light from the TV)

What type of energy is shown below?

What type of energy is shown below?

Chemical

What type of energy is shown below?

What type of energy is shown below?

Electromagnetic (Infrared and Visible Light)

Energy Conversion In A Car

Chemical Energy

Electri

cal E

nerg

y

Mechanical Energy

Thermal Energy

Electromagnetic Energy

Energy Conversion