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Questions and Answers
Explain the purpose of gears in a machine.
Gears transmit torque and speed, change the speed, torque, and direction of a power source, and create a mechanical advantage through their gear ratio.
What is the basic principle behind the operation of gears?
The basic principle behind the operation of gears is analogous to the basic principle of levers.
What is the informal name for a gear?
A gear may also be known informally as a cog.
What is the relationship between the rotational speeds and torques of two meshing gears?
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What are two or more meshing gears working in a sequence called?
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Study Notes
Gears and Gear Mechanisms
- A gear is a rotating circular machine part with cut teeth or inserted teeth (cogs) that mesh with another toothed part to transmit torque and speed.
- The operating principle of gears is similar to levers.
- Gears can change the speed, torque, and direction of a power source.
- Gears of different sizes produce a change in torque, creating a mechanical advantage, through their gear ratio, making them a simple machine.
Gear Ratio and Meshing
- The rotational speeds and torques of two meshing gears differ in proportion to their diameters.
- The teeth on two meshing gears have the same shape.
- Two or more meshing gears in a sequence are called a gear train or transmission.
Gear Trains and Transmissions
- A gear train or transmission is analogous to a crossed, belt pulley system with wheels.
- Gears in a transmission have an advantage in their teeth.
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Description
Test your knowledge of gears with this quiz! Learn about the principles of gear operation and how they transmit torque and speed. Challenge yourself with questions about cogwheels, gearwheels, and the analogies to levers. See how much you know about these essential machine parts!
