(Gears 2)
Gears are used to change speed in rotational movement. In the example above
the blue gear has eleven teeth and the orange gear has twenty five. To turn
the orange gear one full turn the blue gear must turn 25/11 or 2.2727r turns.
Notice that as the blue gear turns clockwise the orange gear turns anti-clockwise.
In the above example the number of teeth on the orange gear is not divisible
by the number of teeth on the blue gear. This is deliberate. If the orange
gear had thirty three teeth then every three turns of the blue gear the same
teeth would mesh together which could cause excessive wear. By using none divisible
numbers the same teeth mesh only every seventeen turns of the blue gear.
