Pulleys can be viewed simply as levers. The relative positions of the load, anchor (or fulcrum), and effort determine which of the three classes of lever illustrated at the right is in use.
Source: Adapted from Pulleys as Levers, by Richard Delaney, Copyright © 2013. All Rights Reserved. Excerpted with expressed written permission. To learn more about rope access work, climbing, and rope rescue, visit Richard's Rope Test Lab group page on Facebook.
Richard Delaney has worked professionally with ropes since 1992. Initially, this was as a multi-pitch, rock-climbing guide, but this soon morphed into specialized rescue instruction and rope access work. He is currently an accredited Vertical Rescue Instructor/Assessor, a Level 3 Rope Access Technician, a Technical Director of the Australian Rope Access Association, and the administrator of the Rope Test Lab group on Facebook. Understanding and teaching the Physics of Rigging is a core passion of Richard's, one based on his experience, and his prior professional life as a qualified engineer.
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