1. Energy chapter 9
What is Energy?

2. Objectives:
Standard: There are different forms of energy, and those forms of energy can be changed from one form to another – but total energy is conserved.
I will identify the different types of energy and their characteristics as they relate to work.
I will compare and contrast potential and kinetic energy using a Venn Diagram.

3. Identify Potential and Kinetic and Explain Why

4. The tennis player does work and transfers energy to the racket
The tennis player does work and transfers energy to the racket. With this energy, the racket can then do work on the ball.

5. Process Chart
Work is done by the tennis player on the racket. Energy moves from the ____________________ __________________ to the ______________ The tennis racket does work on the ball. _______________ to the _______________.

6. Energy Kinetic Energy the ability to do work
work is the transfer of energy
measured in joules
power = energy transferred
time
the energy an object has due its motion
depends on mass and velocity
KE increases as mass increases and when velocity increases
KE = mass x velocity² 2

8. Potential Energy
Gravitational Potential Energy
Elastic Potential Energy
stored energy
has the potential to do work
PE related to an object’s height
GPE = weight x height
PE associated with objects that can be stretched or compressed

10. Wile E Coyote and the Roadrunner
Potential Energy and Wile E Coyote
View the video.
Find someone at a table across the room (opposite side of where you are located) and discuss the types of potential energy and its conversion shown in the video
Return to your seat and write this down in your own words.

12. Forms of Energy Mechanical Energy
associated with the position and motion of an object
combo of kinetic and potential energy
ME = PE + KE
more ME, more work you can do

13. Thermal Energy
total potential and kinetic energy of particles
faster particles move = more KE = more thermal energy
heat energy

14. Electrical Energy
Chemical Energy
energy of electric charges
can be KE or PE depending on if it is moving or stored
ex. lightning, batteries, electrical lines
PE stored in chemical bonds
CE stored in foods, matches, cells in your body

15. Nuclear Energy
Electromagnetic
Energy
PE stored in the nucleus of an atom
released during a nuclear reaction
ex. nuclear fission (nucleus splits) and nuclear fusion (nuclei fuse)
travels in waves
ex. sunlight, microwaves, x-rays

16. Law of Conservation of Energy
when one form of energy is transformed to another, no energy is destroyed
energy cannot be created nor destroyed
ex. spinning top stops and falls b/c mech. energy is transformed to thermal due to friction

17. Energy Transformations
change from one form of energy to another
single or multiple
single – body transforms chemical energy in food to mechanical
multiple – mech. used to strike a match » thermal (friction) » chem. (stored in match) » thermal (heat you feel) and electromagnetic (light you see)

18. Energy and Energy Transformation
Wile E Coyote and Roadrunner
View the video.
Find a different partner (15 seconds) and discuss types of energy and energy transformation in the video
Whole class discussion.

20. Alarm clock Battery Light bulb Blender
electrical energy  light and sound energy
Battery
chemical energy  electrical energy
Light bulb
electrical energy  light and thermal energy
Blender
electrical energy  kinetic and sound energy

22. Combustion
process of burning fuels
fuel’s chem. energy is transformed to thermal energy

23. Potential and Kinetic Energy Song
Make a Venn Diagram of Kinetic and Potential
Review
Potential and Kinetic Energy Lesson