Learn about levers and make the connection between these simple machines and the human body.

This site provides a description of the lever and its many uses.

[Free Registration/Login may be required to access all resource tools.] Definition of a lever and the three different classes, and how each one changes force.

Young scholars will apply the concept of levers to the human body and build all three classes of levers within a musculoskeletal context. They will be shown how the musculoskeletal system is a system of levers and one example of each...

This is a five-question quiz related to the passage "The Forearm as an Example of a Third-class Lever."

Step-by-step illustrated instructions for an experiment investigating how a lever works. An explanation of the science involved is given at the end.

A slideshow and a short quiz on simple machines and how they reduce the amount of work or effort needed to complete a task.

Students investigate the relationship between the two forces and the location of the fulcrum in a first class lever. Students work in cooperative groups of approximately three to make observations that they can then generate a formula...

Examine the classes of levers and discover how levers work by raising a brick with shish kebab skewers.

[Free Registration/Login Required] Drag the labeled triangles to indicate where the fulcrum of this third-class lever is as well as the input and output forces.

This site details how simple machines create a mechanical advantage for humans. Levers, theoretical mechanical advantage, actual mechanical advantage, and pulley systems are discussed.

Utilize an understanding of how a lever works to lift an obelisk, using as few of the weights and support stones as possible in this online interactive activity.