A pulley is a wheel on an axle that is designed to support movement of a cable or belt along its circumference. Pulleys are used in a variety of ways to lift loads, apply forces, and to transmit power. A pulley is also called a sheave or drum and may have a groove between two flanges around its circumference.What is the scientific definition of pulley?
The definition of a pulley is a small fixed wheel or a group of such wheels with a rope or chain in a grooved rim that is used to lift something up. An example of a pulley is a device for raising a flag. YourDictionary definition and usage example.What is a pulley in science?
A pulley is simply a collection of one or more wheels over which you loop a rope to make it easier to lift things. Pulleys are examples of what scientists call simple machines. That doesn't mean they're packed with engines and gears; it just means they help us multiply forces.Does a pulley use friction?
Real-world pulleys will always have some friction , and you need to exert a little extra force to overcome it. In this project you will investigate simple and compound pulleys-and how they change the force required to lift a load.