1. Nature of Energy Energy is all around you!
You can hear energy as sound.
You can see energy as light.
And you can feel it as wind.

2. Nature of Energy You use energy when you: hit a softball.
lift your book bag.
play Black Ops.

3. Living organisms need energy for growth and movement.
Nature of Energy
Living organisms need energy for growth and movement.

4. Nature of Energy Energy is involved when: a bird flies.
a bomb explodes.
rain falls from the sky.
electricity flows in a wire.

5. Nature of Energy
What is energy that it can be involved in so many different activities?
Energy can be defined as the ability to cause change.
If an object or organism does work (exerts a force over a distance to move an object) the object or organism uses energy.

6. States of Energy Potential Kinetic
All forms of energy can be in either of two states:
Potential
Kinetic

7. Kinetic Energy The energy of motion is called kinetic energy.
Mass and Velocity effect Kinetic Energy
The faster an object moves, the more kinetic energy it has.
Velocity
The greater the mass of a moving object, the more kinetic energy it has.
Mass
Equation for Kinetic Energy =

8. Kinetic Energy The energy of motion is called kinetic energy.
Mass and Velocity effect Kinetic Energy
The faster an object moves, the more kinetic energy it has.
Velocity
The greater the mass of a moving object, the more kinetic energy it has.
Mass
Equation for Kinetic Energy =
m = mass
v = velocity
v = distance / time
Just like in your car miles per hour

9. Kinetic Energy Example
Equation for Kinetic Energy =
IF a cannon ball and a bullet are fired at the same time and hit the back wall at the same time. Which has more kinetic energy? Why?

10. Potential Energy Potential Energy is stored energy.
Stored chemically in fuel, the nucleus of atom, and in foods,
Or stored because of the work done on it:
Stretching a rubber band.
Winding a watch.
Pulling back on a bow’s arrow.
Lifting a brick high in the air.

11. Potential Energy
If you stand on a 3-meter diving board, you have 3 times the Potential Energy, than you had on a 1-meter diving board.
“The bigger they are the harder they fall,” is not just a saying. It’s true. Objects with more mass have greater Potential Energy!
Height & Weight effect Potential Energy
Equation for Potential Energy = mgh
m = mass
g = gravitation constant
9.8
Mass x Gravity = weight
h = height (meters)

12. Kinetic - Potential Energy Conversion
Roller Coasters because of the energy that is built up into the system. Initially, the cars are pulled mechanically up the tallest hill, giving it the greatest potential energy. From that point the conversion between potential and kinetic powers the car for the entire ride.

13. Ball speeds up
Ball slows down

14. The Law of Conservation of Energy
Energy can be neither created nor destroyed by ordinary means.
It can only be converted from one form to another.

15. Questions
Use pages of the Motion Forces and Energy Text and pages of the Physical science text as a resource if needed to complete the following questions.
In your own words what is the difference between kinetic and potential energy.
Identify and Describe a change from potential to kinetic. Mr. Gordon described a rollercoaster and a jump shot. Pick something else to explain
In your own words what is the law of conservation of energy?

16. Today’s Agenda Energy Notes Read Pages 124 – 130
Answer questions on the handout.