Class 2 Levers: Force Input Angles

This interactive presentation, created by James Bourassa and John Rosz, explains how the input of force reacts with lever systems. The authors address the physics behind levers, and how when proper angles are used in design the effective force increases greatly. The format of the lesson is similar to an animated PowerPoint presentation. Each slide is filled with flash animations lined with the mathematical formulas behind the physics of the problem.