Wheels and Axles
Gears
Pulleys
100
The most common wheel mechanism.
What is a wheel and axle?
100
A modified wheel and axle.
What is a gear?
100
Another example of a device that makes pulling objects easier.
What is a pulley?
200
It consists of a large diameter disk (wheel) attached to a small diameter shaft (axle).
What does a wheel and axle consist of?
200
They are used to speed up or slow down motion, or to change the direction of motion.
What are gears used for?
200
They can be used alone or in combination with other pulleys to create a pulley system.
How can pulleys be used?
300
Changes a small amount of input force into a larger output force.
What does using the wheel do?
300
When gears are used in combination with one another.
What is a gear train?
300
Fixed and moveable pulleys.
What two types of pulleys can pulley systems contain?
400
By either reducing the input force required to push or pull objects or by increasing it.
How do gears work?
400
A pulley attached to a rigid, non-moveable structure at some point.
What is a fixed pulley?
500
The steering column.
What does a steering wheel increase the force to?
500
It drives a follower gear and can also change the axis of rotation through 90 degrees.
What is a worm in a worm gear?
500
A pulley not attached to a fixed structure.
What is a moveable pulley?
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