Simple machines and how to use this tutorial - Khan Academy
https://www.khanacademy.org/science/physics/discoveries/simple-machines-explorations/a/simple-machines-and-how-to-use-this-tutorial
WEBThere are six simple machines. They are as follows: lever, wheel, pulley, incline plane, wedge and screw. This tutorial will cover the first three. Simple machines can give you a mechanical advantage—in other words they allow you to spread the force you apply to move an object over a distance.
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