PLTW Gear Ratios

A 36 tooth driving gear (connected to the motor) is moving a 12 tooth driven gear. What is the gear ratio?... It has a speed advantage.

• 3:1

• 1:3

• 3:3

• 1:1

A 12 Tooth driving gear (connected to the motor) is connected to a 36 tooth driven gear. What is the gear ratio and mechanical advantage?

• 3 : 1 Torque Advantage

• 3 : 1 Speed Advantage

• no Mechanical Advantage

• 1 : 3 Torque Advantage

Tags

NGSS.MS-ETS1-3

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Looking at the picture, what is the gear ratio?

The arrow indicates how the motor is turning the gear.

• 6 : 10

• 5 : 3

• 10 : 6

• 3 : 5

What's the ratio?

Make sure ratio is reduced

• 5 : 7

• 84 : 60

• 60 : 84

• 7 : 5

What's the ratio?

Make sure ratio is reduced

• 1:1

• 84 : 60

• 60 : 36

• 5 : 3

What's the ratio?

Make sure ratio is reduced

• 7 : 1

• 12 : 84

• 84 : 12

• 1 : 7

Looking at the picture, what is the gear ratio?

The arrow indicates how the motor is turning the gear.

• 4 : 6

• 6 : 4

• 2 : 3

• 3 : 2

Tags

NGSS.MS-PS2-2

When gears are equal in size, what is the gear ratio?

• There is no gear ratio when sizes are equal

• 1:3

• 2:5

• 1:1

What is the gear ratio with a driving gear with 40 teeth and a driven gear with 8 teeth?

Make sure ratio is reduced to lowest terms

• 8 : 40

• 1 : 5

• 5 : 1

• 40 : 8

What is the Gear Ratio of a driven gear with 8 teeth and a driving gear with 32 teeth?

Make sure ratio is reduced to lowest terms

• 8 : 32

• 32 : 8

• 1 : 4

• 4 : 1