Thursday, November 03, 2005
Gears, Gear Trains 11-3-05
Gears can be confusing! Today in class we had a great experience discussing,predicting, observing and making conclusions about the simplest of gear ideas.
We found out that when a 40 tooth gear turns for one revolution that the 8 tooth gear will turn 5 times. We then used that idea of gear ratio to discuss bicycle gears in relation to speed, effort, and power. We'll discuss some other concepts like torque in the near future.
What a day! I think several students were not very clear about how the ratios work. Now I think we made progress. We will do more demonstrations with gears and wheel size. The demonstration with the two robots with identical gears going different speeds due to different wheel size was an eye-opener too!
Any thoughts about todays demonstrations or ideas for further discussion?
How about just telling me one simple thing you learned today?
I would like a comment from every student.
BUILD ROBOTS THAT YOU CONTROL WITH GEAR TRAINS!