double pulley system

System consisting of two pulleys with a rope running around them to lift a load. Using two or more pulleys reduces the amount of effort needed.

load

Weight whose inertia exerts a force opposite to the force exerted on the rope.

pulley

Device with a grooved wheel (sheave wheel) around which a rope passes to transmit the effort exerted on the load.

rope

Cord that slides on the pulley and is pulled to lift the load.

effort

Force exerted on the pulley’s rope to lift the load.