Movable pulleys are used frequently and some common examples include weightlifting machines used in modern gyms, construction cranes and elevators. Many are used in very large and complex pieces of industrial machinery, while others are simple portable devices like chain or mining hoists.Continue Reading
All pulleys are simple mechanical devices that have been in use for many centuries, and historians believe humans were using simple static pulleys as far back as 1500 B.C.
There are several examples of movable pulleys that appear frequently in everyday life including:
Examples of pulleys that can be found in the home include window blinds and garage doors. Typically, window blinds are set on pulley systems that allow them to move up and down by pulling on their cords. Garage doors are also set on similar types of system.Full Answer >
Levers and pulleys are two types of simple machines that allow people to use less energy when performing work. A simple lever is a long pole or platform used to lift an object. In a simple pulley system, a rope looped around a wheel is used to raise and lower objects.Full Answer >
A compound pulley, sometimes referred to as a block-and-tackle system, is a mechanical arrangement of pulleys that permits a trade-off of applied force for distance, according to HowStuffWorks. By slinging rope over and through a system of wheels, a compound pulley permits weights to be lifted and pulled with the application of relatively little force, saving energy and reducing the power needed to accomplish work.Full Answer >
A combined pulley is a type of pulley that has and uses movable and fixed pulleys simultaneously. In this system, many pulleys can be used at the same time with less weight needed to lift an object.Full Answer >