1. Energy
Notes

2. The Universe is made of 2 things…

3. Matter It has mass It takes up space Energy Not like matter
Does not have any mass
Does not take up space
Energy moves matter

4. NOTES

5. Energy: The ability to do work
Examples:
Wind has energy because it moves things
Fire (heat) can change water to steam
Electricity can produce sound and light

6. Two Kinds of Energy:
Potential Energy: Stored energy, waiting to become kinetic energy
PE (potential energy) depends on the object’s MASS and HEIGHT

7. Kinetic: energy in motion
The more Mass and/or Velocity (speed) something has, the more kinetic energy
EX: a bowling ball has more kinetic energy than a golf ball at he same velocity

8. Many forms of energy
Gravitational potential: it depends on weight (mass) & height
Elastic potential: objects stretched or compressed (bow & arrow)
Thermal: heat from vibrations of atoms within matter
Chemical Potential: energy stored in chemical bonds; released in chemical reactions

9. Many forms of energy Electrical: movement of electrical charges
Nuclear: energy stored in nucleus of an atom; released in nuclear reaction
Mechanical: motion and ability to do work
Electromagnetic: travels in waves (light, microwaves, UV radiation, infrared)
Sound: vibrations of air

11. …and...That’s all folks...(for now)

12. Energy Transformations (a.k.a. energy conversions)

13. Law of Conservation of Energy
Remember, the universe is made of only 2 things: Matter and Energy
Energy cannot be created or destroyed (just like matter)
Energy can only change form

14. Pendulums
Max Potential Energy at 1 and 3
Max Kinetic Energy at 2

15. Law of Conservation of Energy
Energy cannot be created or destroyed
It only converts (changes) from one form to another form

16. Conversion of Potential and Kinetic
Kinetic and Potential energy convert back and forth all the time.
The more potential E. you start with, the more kinetic E. you end up with

17. Important Examples. Know These!!
The Blue Ball at the top of the arc has the most _____________ energy.
As the ball drops, it loses _________ energy and gains __________ energy.