Emergency pull-wire switches have become established as "extended emergency-stop" buttons, especially along conveyor belts: one pull on the wire, and the relevant part of the machine comes to a safe ...

Explains how pulleys work to lift heavy weights more easily. A fixed pulley changes the direction of force, allowing for easier lifting, while a movable pulley reduces the amount of force needed to ...

Pulley systems are simple machines that make lifting heavy objects easier. They consist of a rope or cable that passes over one or more wheels (pulleys). A single pulley changes the direction of force ...