simple machine
lever
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A simple machine made up of a bar that pivots at a fixed point called a fulcrum.
wheel and axle
![](http://www.softschools.com/examples/images/wheel_and_axle_4.png)
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A simple machines consisting of two circular objects of different sizes; the wheel is the larger of the two circular objects.
pulley
A pulley is a wheel and axle designed to support a rope or a cable; used to lift loads, apply force, and transmit power.
Subtopic
screw
![](https://images.homedepot-static.com/productImages/8f5eb465-e850-437e-8d5e-3b79a4b9071a/svn/grabber-drywall-screws-23175-64_1000.jpg)
Subtopic
A screw is formed when an incline plane is wrapped around a cylinder
wedge
![](https://2ecffd01e1ab3e9383f0-07db7b9624bbdf022e3b5395236d5cf8.ssl.cf4.rackcdn.com/Product-800x800/7ebe2c80-da08-47f8-a1a1-de348bdb1f37.png)
Subtopic
A triangular shaped tool used to separate two objects, lift an object, or hold an object in place.
incline plane
![](http://cf.ydcdn.net/latest/images/main/A5inclinedplane.jpg)
Subtopic
An incline plane is a flat supporting surface tilted on an angle; used to help raise or lower a load with less work.