1. Introduction to Energy

2. Interpret the relationship between potential and kinetic energy.
SPI
Distinguish among gravitational potential energy, elastic potential energy, and chemical potential energy.
SPI
Interpret the relationship between potential and kinetic energy.

3. What is Energy? Energy is the ability to do work.
Work is the transfer of energy.
Work occurs when a force causes an object to move in the direction of the force.

4. What is Energy?
What is the relationship between work and energy? (Discuss with your neighbor.
You cannot have work without energy!

5. Kinetic Energy is the energy of motion.
Two Types of Energy
Kinetic Energy is the energy of motion.

6. Examples of Kinetic Energy
Cheetah Running
Dolphins Jumping

7. Potential Energy is the energy of shape or position (stored energy.)
Two Types of Energy
Potential Energy is the energy of shape or position (stored energy.)

8. Examples of Potential Energy
Elastic Potential
Gravitational Potential

9. What is Mechanical Energy?
Mechanical energy is the total energy of motion and position of an object.
Mechanical energy = Kinetic energy + Potential energy

10. Examples of Mechanical Energy
Weight Lifting
Running Engine

11. Types of Potential Energy

12. Elastic Potential energy - energy stored in stretched out items
Elastic Potential energy - energy stored in stretched out items. After the item is stretched it returns to its original position or shape.
Ex: bow strings, rubber bands

13. Elastic Potential Energy

14. Gravitational Potential Energy - energy given to an object after it has been lifted or elevated
Ex: book on a shelf

15. Examples of Potential Energy
Elastic Potential
Gravitational Potential

16. Chemical Energy Energy released from chemical reactions
Example: a battery
Chemical energy is a form of potential energy!!

17. Thermal Energy
Total energy of particles that make up an object; heat energy
Example: the sun

18. Electrical Energy
Energy of moving electrons
Example: hair dryer

19. Light Energy
Caused by the vibrations of electrically charged particles
Example: light bulb

20. Sound Energy
Caused by an object’s vibration
Example: radio

21. Nuclear Energy
The energy associated with changes in the nucleus of an atom
Example: nuclear power plant

22. Nuclear Energy Everything is made up of atoms!
They are made of protons, neutrons and electrons.

23. Nuclear Energy
In order to create nuclear power an atom must either be split in two or joined with another atom.
This is not a process that is easily done. It requires a lot of work and highly qualified persons – as well as advanced technology.