To make a simple pulley, stick wire through an empty thread spool such that the spool can spin freely and attach the wire to a stationary object, then tie a small object such as a toy or pencil to a string and run the st... More »

The pulley is an effective mechanism that allows the user to lift or drag an object without overexerting. Making a simple pulley system requires just a few basic steps. To construct this system, you will need a basic pul... More »

A double pulley system, also known as a block and tackle, provides a mechanical advantage that allows for increased lifting force to be applied when pulling a rope or cable. By dividing weight between multiple pulleys, h... More »

According to Jibbaroo, to make a compound pulley system, you need two wheels from a K'nex set, seven paper clips, tape, string and a 1- to 3-pound hand weight or an unopened can of food. Jibbaroo provides the steps neede... More »

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A pulley works by changing the direction that force must be applied to lift an object against gravity. Other, more complex, systems use multiple pulleys to reduce the amount of force that must be applied. More »

A fixed pulley is stationary and doesn't move; it changes the direction of force to move an object. An example of a fixed pulley is the traditional water well where a fixed beam is suspended over the opening and the pull... More »

The pulley is an effective mechanism that allows the user to lift or drag an object without overexerting. Making a simple pulley system requires just a few basic steps. To construct this system, you will need a basic pul... More »