The simple machines that changed the world throughout history. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Throughout history, humans have ...
A simple machine is a tool that helps us do work. They use clever shapes to help us move, lift, cut and other types of work. Learn more about the inclined plane, the pulley, the lever, the wheel and ...
Simple machines make work easier to do. But how? Join Joan at the Discovery Center of Idaho as she tries various experiments with simple machines. Science Trek is available to stream on pbs.org and ...
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