1. Do NOT open up the bins in the center of your table.
Wait patiently for a Scantron. Put your name on it and wait for the pink sheet.

2. Potential and Kinetic Energy Notes
Please turn to page _____ and glue your notes in!

3. What is Energy? What is the relationship between energy and work?
Energy is the ability to do work.
What is work?
Work is done when a force (caused by energy) causes an object to move.
What are the different types of energy?
Song: (1:54)

4. Energy / Work
Energy is needed to push a box across the floor. The box moving across the floor is an example of work.
Energy is also needed to hit a home run. The ball flying over the fence is an example of work.

5. Two Basic Types of Energy
Potential Energy = the energy of an object due to its position, shape, or condition
Kinetic Energy = the energy of an object due to the object’s motion

6. Not all energy has to do with motion!
Potential Energy
Not all energy has to do with motion!
Potential Energy = the energy an object has due to its position, shape, or condition.
Objects with potential energy have the potential, or ability, to do work.

7. Potential Energy Preview
We will learn about five kinds of Potential Energy
Elastic Potential Energy
Chemical Potential Energy
Gravitational Potential Energy
Electrical Potential Energy
Magnetic Potential Energy

8. Elastic Potential Energy
Stored as a result of deformation (stretching or compressing) of an elastic object.
The bow has energy because work has been done to change its shape.
The energy of that work is turned into potential energy.
When the arrow is released the potential energy of the bow and string will be transferred to the arrow, sending it flying through the air.
(0:47)

9. Elastic Potential Energy
Compressed, or squished, springs have potential energy.
A spring has energy because work has been done to change its shape.
Just like the bow, the energy of that work is turned into potential energy.
What about rubber bands and other things that stretch?

10. Chemical Potential Energy
The potential energy stored in substances due to the position and arrangement of the atoms in a compound.
A battery has potential energy due to its condition.
PE is stored in the chemicals within the battery.
A fully charged battery has the potential to do work.
When the chemical reaction takes place, some sort of heat is given off (thermal energy is given off

11. Chemical Potential Energy
Chemical Potential Energy can also be found in food.
Calories are a measurement of this energy.
Let’s watch how calories are determined:
(4:08)

12. Gravitational Potential Energy
Stored energy based on the weight and height of an object.
When someone pushes you on a swing, you and the swing gain potential energy because work has been done to change your position.
You will have the most potential energy at the top, right before you begin your arc downward.
Think about swinging. When will you have the most kinetic energy?

13. Gravitational Potential Energy
When you lift an object, you do work on it.
You use a force that is against the force of gravity.
When you do this you transfer energy to the object and give the object Gravitational Potential Energy.
The amount of Gravitational Potential Energy an object has depends on the objects weight and height above the ground.

14. Gravitational Potential Energy
Books on a shelf have Gravitational Potential Energy.
Which book has the most Gravitational Potential Energy? Why?

15. Gravitational Potential Energy
Wile E Coyote and the Roadrunner:
4r9E (1:22)

16. Electrical Potential Energy
Energy contained in an electric field based on position of the electrically charged objects relative to one another and the amount of charge they have.
(3:49)

17. Electrical Potential Energy
Static electricity involves objects like a balloon or the family's pet cat that have extra electrons, especially in dry weather.
If you rub a balloon on your hair and stick it to the wall, that's using static electricity.
When you pet the cat on a dry day, you may hear a crackling sound or see tiny sparks which is also static electricity.

18. Electrical Potential Energy
Static Electricity Trick:
(1:13)

19. Magnetic Potential Energy
Energy stored in magnetic fields; based on the position of magnets to one another.
A change in position of magnetic objects relative to each other is evidence of a change in magnetic potential energy.

20. Magnetic Potential Energy
If we have two strong identical magnets far apart and nudge them closer together, at some point they will snap together and remain together.
There is potential energy between the magnets as they are apart. When they reach the point that they actually snap together, it is then kinetic as they are moving toward each other.
(2:30)