A pulley is a simple machine using a wheel and a cord that's designed for lifting. A pulley is a simple machine using a wheel and a cord that's designed for lifting. Pulleys help make work easier by ...

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Tangle-web spiders can catch prey up to 50 times their size thanks to their pulley system-like hunting strategy. Photo by Emanuele Olivetti It sounds like a scene out of a horror movie. A hapless ...

Have you ever seen a flag being raised, or wondered how a mechanical clock works? Let’s take a look at some of the simple mechanisms that they use. Pulleys and gears. When a flag is raised, it will ...