DefinitionA <PULLEY> is an <ARTEFACT> and a <TRANSMITTER(force)> that is an assembly of a wheel mounted onto a shaft and provided with a crowned or cambered rim to carry an endless belt, or grooved for carrying a rope or chain
A rope, cable, belt, or chain usually runs over the wheel and inside the groove, if present.|Pulleys are used to change the direction of an applied force, transmit rotational motion, or realize a mechanical advantage in either a linear or rotational system of motion.