What is a gear ratio?
PLTW Gears

Flashcard
•
Science, Mathematics
•
9th - 11th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
The gear ratio is the ratio of the number of teeth on two meshing gears. It determines the relationship between the input speed and output speed of the gears.
2.
FLASHCARD QUESTION
Front
How do you calculate gear ratio?
Back
Gear ratio = Number of teeth on driven gear / Number of teeth on driving gear.
3.
FLASHCARD QUESTION
Front
What is the gear ratio of a 36 tooth driving gear and a 12 tooth driven gear?
Back
1:3
4.
FLASHCARD QUESTION
Front
What does a gear ratio of 1:3 indicate?
Back
It indicates that for every 1 rotation of the driving gear, the driven gear rotates 3 times, providing a speed advantage.
5.
FLASHCARD QUESTION
Front
What is the gear ratio of a 6 tooth input gear and a 48 tooth output gear?
Back
8:1
6.
FLASHCARD QUESTION
Front
What does a gear ratio of 8:1 indicate?
Back
It indicates that for every 8 rotations of the input gear, the output gear rotates once, providing a torque advantage.
7.
FLASHCARD QUESTION
Front
What happens to torque when speed increases in a gear system?
Back
Torque decreases when speed increases.
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