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en.wikipedia.org/wiki/Pulley

A pulley is a wheel on an axle or shaft that is designed to support movement and change of direction of a taut cable, supporting shell is referred to as a "block.".

www.amazon.com/pulleys/b?node=511408

Results 1 - 24 of 15341 ... Shop through a wide selection of Pulleys at Amazon.com. Free shipping and free returns on Prime eligible items.

www.brainpop.com/technology/simplemachines/pulley

In this BrainPOP movie, Tim and Moby teach you about pulleys, which are among the most useful tools ever invented. Pulleys decrease the amount of effort you ...

www.grainger.com/category/sheaves-and-pulleys/power-transmission/ecatalog/N-aqz

Look to Grainger for sheaves and pulleys ideal for countless lifting applications, regardless of size or weight. Simplify your heavy hoisting jobs. Shop today!

www.explainthatstuff.com/pulleys.html

May 29, 2016 ... An easy-to-follow explanation of how pulley wheels help you lift more by multiplying your lifting force.

.ask.com/youtube?q=Pulleys&v=LiBcur1aqcg
Feb 14, 2012 ... Pulley is a simple machine and comprises of a wheel on a fixed axle, with a groove along the edges to guide a rope or cable. Pulleys are used ...

quatr.us/physics/machines/pulley.htm

April 2016 - A pulley is really a kind of wheel, just as a screw is a kind of inclined plane. But pulleys are so important that people give them their own category.

www.harborfreight.com/material-handling/rope-pulleys.html

Rope pulleys and heavy duty trolley wheels at Harbor Freight Tools. Cheap prices on rope pulley hoists, trolley wheels and more load handling tools.

teacher.scholastic.com/dirtrep/simple/pulley.htm

The pulley is really a wheel and axle with a rope or chain attached. A pulley makes work seem easier because it changes the direction of motion to work with  ...