This lesson will introduce the three types of levers and show how to calculate the mechanical advantage of each. It is 3 of 3 in the series titled "Simple Machines: Levers."

Explains what a lever is, its history, how it works, the formula for calculating its mechanical advantage, classes of levers, and uses of levers.

This site illustrates different classes of levers that are used in simple machines.

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

[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.

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

Step into Dirtmeister's Science Lab and help him answer the challenge question: "How can you lift four times your weight?" Learn about levers, make your predictions and then do the experiment.

An explanation of the three types of levers, with examples of each. The formula for the law of equilibrium is also demonstrated.

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

Andy Peterson and Zack Patterson use the seesaw to illustrate the amazing implications and uses of the lever. [4:45]

A video tutorial showing the relationship between levers and work as it relates to mathematics. [4:33]

Students 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 type of...

A quite lengthy chapter on the simple machine the lever. Includes uses, classes, mechanical advantage, formulae, etc. A full discussion, with good illustrations.

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...

During this instructional activity, students will have the opportunity to explore levers through hands-on experiences and by navigating the Internet. This instructional activity allows students to use their experiences to determine how...

Through observation and inquiry, students are given various objects to investigate how levers work and why they might be useful.

Help lift this Obelisk monument by designing a lever to do the job as efficiently as possible.

[Free Registration/Login Required] With the given shapes and labels, construct a second-class lever that would help in lifting very heavy items.

This lesson introduces students to three of the six simple machines used by many engineers: the lever, the pulley, and the wheel-and-axle. In general, engineers use the lever to magnify the force applied to an object, the pulley to lift...

Wikipedia offers excellent information on levers, including a hyperlinked table of contents, images, and examples.

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

This lesson will introduce the three types of levers and show how to calculate the mechanical advantage of each. It is 2 of 3 in the series titled "Simple Machines: Levers."

This lesson introduces the concept of a lever arm.

This site provides a brief description of the three classes of levers.