1. What does the simulation show?

Rotate the hand crank of the small gear in a clockwise direction

2. What direction does the large gear rotate ( clockwise/anti-clockwise) if you rotate the crank in an anticlockwise direction?
3. How many teeth are in the small gear ( Hint - Use the properties of the gear to count them )?
4. What is the diameter of the small gear?

Rotate the crank five times.

5. How many times did the large gear rotate? 

Increase the number of teeth in the large gear.  Try putting 36 teeth on the large gear. 

6. What is the ratio of the number of times that you must rotate the crank to rotate the larger wheel?