Gear Ratio Review

What can gears NOT change?

• Speed

• Direction

• Color

• Torque

Why does the yellow gear travel half the speed of the red driving gear?

• It has the same number of teeth.

• It has twice as many teeth.

• It has its own motor.

• It has half the number of teeth.

What is the gear ratio between a 15T gear and a 30T gear?

• 2/1

• 5/3

• 1/3

• 2/5

TRUE or FALSE: An idler gear in the middle changes the ratio of the outside gears?

• TRUE

• FALSE

What does an idler gear change?

• The size of the gears.

• The gear ratio.

• The friction in the gear train.

• The direction of rotation.

What is gear ratio?

• All in your imagination.

• The name of the next Marvel super hero.

• A comparison between gear teeth that tells you how many times gears will spin.

• A way to sound smart.