Title: Experiment One (Course Presentation)

[Image: Fan with no gears]

Without any gears on your handheld fan, spin the handle at an even, medium pace with your hand and observe how fast the fan blades spin.

You may wish to practice doing this with a tune in your head, spinning the handle in time with the beat, so that you can keep a steady pace.

Two small gears

Q: Guess the speed of the fan using this gear combination (compared with no gears at all):
- Faster (correct) (Thank you for entering your hypothesis. Continue to find out if you are correct.)
- Slower (correct) (Thank you for entering your hypothesis. Continue to find out if you are correct.)
- Same (correct) (Thank you for entering your hypothesis. Continue to find out if you are correct.)

[Image: Two gears with 8 teeth each]

Driving gear: 8 teeth
Driven gear: 8 teeth

Q: Build this gear combination onto your fan and test it out. How does the speed of the fan compared to with no gears at all?
- Same (correct)
- Slower
- Faster

Two large gears

Q: Guess the speed of the fan using this gear combination (compared with no gears at all):
- Faster (correct) (Thank you for entering your hypothesis. Continue to find out if you are correct.)
- Slower (correct) (Thank you for entering your hypothesis. Continue to find out if you are correct.)
- Same (correct) (Thank you for entering your hypothesis. Continue to find out if you are correct.)

[Image: Two gears with 24 teeth each]

Driving gear: 24 teeth
Driven gear: 24 teeth

Q: Build this gear combination onto your fan and test it out. How does the speed of the fan compared to with no gears at all?
- Same (correct)
- Slower
- Faster

Small gear driving large gear

Q: Guess the speed of the fan using this gear combination (compared with no gears at all):
- Faster (correct) (Thank you for entering your hypothesis. Continue to find out if you are correct.)
- Slower (correct) (Thank you for entering your hypothesis. Continue to find out if you are correct.)
- Same (correct) (Thank you for entering your hypothesis. Continue to find out if you are correct.)

[Image: 8-tooth gear driving a 24-tooth gear]

Driving gear: 8 teeth
Driven gear: 24 teeth

Q: Build this gear combination onto your fan and test it out. How does the speed of the fan compared to with no gears at all?
- Slower (correct)
- Same
- Faster

Large gear driving small gear

Q: Guess the speed of the fan using this gear combination (compared with no gears at all):
- Faster (correct) (Thank you for entering your hypothesis. Continue to find out if you are correct.)
- Slower (correct) (Thank you for entering your hypothesis. Continue to find out if you are correct.)
- Same (correct) (Thank you for entering your hypothesis. Continue to find out if you are correct.)

[Image: 24-tooth gear driving a 8-tooth gear]

Driving gear: 24 teeth
Driven gear: 8 teeth

Q: Build this gear combination onto your fan and test it out. How does the speed of the fan compared to with no gears at all?
- Faster (correct)
- Slower
- Same

Conclusion

- What conclusions can be drawn from your investigation?
Drag the words into the correct spaces
- Using two gears of the same size will make the speed
- A bigger gear driving a smaller gear will make the speed
- A smaller gear driving a bigger gear will make the speed
- THE SAME
- FASTER
- SLOWER
Q: Q1
A: THE SAME
Q: Q2
A: FASTER
Q: Q3
A: SLOWER