Lesson: 20L ESR Advanced Gearing Challenges

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In this challenge, students learn about Compound Gearing and build gear ratios as large as 100's to 1.

1) Step through the animations in this online PowerPoint file (Be sure to select "Start Slide Show in the upper right, and then "click" through the slides to see the animations) to learn about Compound Gearing and this Challenge:

Compound Gearing Challenge Slideshow

Spoiler Alert: Clicking through all the slides will reveal the complete solution.

2) Try building the largest gear ratio you can between the crank axle and the wheel axle.

3) Next try this advanced Gearing Challenge: The Snail Race

Create a robot that:
> Has a single large motor running at 100% Power forever.
> Uses Compound Gearing Down to build a gear train between the motor and your wheels, so your robot takes the longest possible time to travel 12 inches along the floor.

How Slow Can You Go????

4) Answer this question:

Why does Compound Gearing make such a huge difference in speed?


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