Blocks & Sheaves

Blocks and pulleys are simple machines that are commonly used in a variety of applications to lift or move heavy objects. A block and tackle system consists of one or more pulleys, which are wheels with grooved rims designed to guide ropes, belts or cables, and one or more blocks, which are assemblies of pulleys. The belt or cable is threaded through the pulleys and attached to the object to be lifted or moved, allowing for mechanical advantage.
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