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Simple Machines

This series of three interactive, multimedia activities introduce and demonstrate the properties of six simple machines. Specifically, the lessons show how levers, pulleys, inclined planes, screws, wheels and axles, and wedges can reduce the amount of work done by humans. After learning about the characteristics of each classification, users can try to find the simple machines that make up a lawn mower. By inspecting the mower from different angles, several simple machines are revealed and must be identified. The final activity lets users test their knowledge of the mechanics of simple machines. Following a builder through each stage of constructing a tree house, users can apply equations to determine the mechanical advantage supplied by using the tools.
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