PLTW Gear Ratios

When speed increases, what happens to the value of torque?

• increases

• decreases

• stays constant

When speed decreases, what happens to the value of torque?

• increases
• decreases
• stays constant

What is the function of the smaller gear?

• Makes the output gear turn slower
• Makes the output gear turn faster
• Makes the larger gears turn in opposite directions.
• Makes the larger gears turn in the same direction.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Simplify the ratio of
35 : 14

• 5 : 2
• 2 : 5
• 3 : 1
• 35: 14

When the output gear is larger than the input gear you have.....

• Increased Speed, decreased torque

• Increased Torque, decreased speed

Looking at the picture, what is the gear ratio?

• 4:6
• 6:4
• 2:3
• 3:2

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-1

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

• 1:2
• 1:3
• 2:5
• 1:1

When on a bike going uphill, what happens to the speed and torque?

• Speed decreases; torques increases
• Speed decreases; torques decreases
• Speed increases; torques decreases
• Speed increases; torques increases

True or false; both speed and torque can increase at the same time.

• true
• false
• not enough information

# of teeth input gear = 60

# of teeth output gear = 36

What is the gear ratio (in lowest terms)?

• 36:60

• 60:36

• 3:5

• 5:3