- Pulley - Wikipedia
In Roman Egypt, Hero of Alexandria (c 10–70 AD) identified the pulley as one of six simple machines used to lift weights [3] Pulleys are assembled to form a block and tackle in order to provide mechanical advantage to apply large forces
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- How do pulleys work? - Explain that Stuff
A pulley is simply a collection of one or more wheels over which you loop a rope (or chain) to make it easier to lift things Here's an everyday example: Photo: A pulley mounted on a huge lifting frame to make it safer to use
- Pulley | Rope, Belt Sheave | Britannica
pulley, in mechanics, a wheel that carries a flexible rope, cord, cable, chain, or belt on its rim Pulleys are used singly or in combination to transmit energy and motion Pulleys with grooved rims are called sheaves
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