1. DO NOW
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Monday
11/23/15
Name the 2 different sets of points where the object is traveling at a constant speed of 20 m/s.
How many seconds have passed by when the object begins to have negative acceleration?
On an acceleration graph, what other variable can be used on the y-axis instead of “velocity”?
Speed and Velocity may be used interchangeably on acceleration graphs.

2. OBJECTIVE:
Students will use their knowledge of forces, motion, energy, and simple machines to create a chain reaction machine.

3. Agenda Today’s Agenda Review Last Week’s HW
Rube Goldberg Project Introduction
Homework
None

4. Rube Goldberg – Chain Reactions
Rube Goldberg is best known for his “Invention” cartoons, which use a string of outlandish tools and chain reaction to accomplish everyday simple tasks in the most complicated way.
In this example, the machine’s task it to wipe the man’s mouth with a napkin.

5. Ok Go Video - Rube Goldberg Example
Rube Goldberg Machine – Chain Reaction Examples
Ok Go Video - Rube Goldberg Example
Complicated Rube Goldberg Machine
Rube Goldberg Student project.MOV

6. Force and Motion – Chain Reaction
TASK: Create a machine that can be used to accomplish a simple task.
Each group will be given a tray with a variety of materials.
You do not have to use all materials.
With teacher’s permission, you may add materials to your tray (your own personal supplies or materials you see around the room)
Decide what simple task your group will accomplish.
Your machine must complete the task in at least 4 different steps.
You will have 30 minutes to create your machine.
You will present to the class. The class will vote on the most creative.
At the end of class, you must take apart your machine and return all supplies to the tray or to your teacher.