Understanding Pulleys in Mechanical Advantage Systems How Pulleys Work Fixed Pulleys: Function as first-class levers with the fulcrum located at the axle of the sheave. They change the direction of force without increasing MA. For instance, a change-of-direction pulley has an MA of 1:1. Moving Pulleys: Act as second-class levers, where the rope is attached … Continue reading Pulleys and Mechanical Advantage Systems