Skip to main content
Research

3rd Class Lever

by
Last updated: May 5th, 2025
3rd Class Lever
Click to View Larger Image

A third-class lever might be the elbow joint: when lifting a book, the elbow joint is the fulcrum across which the biceps muscle performs the work. Such connections between joints, called synovial joints, are fulcrums, the bones they connect are levers, and the muscles attached to them apply force (or resistance).