Sophia Learning
Sophia: Simple Machines: Levers: Lesson 3
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."
Science Struck
Science Struck: Simple Machine: 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.
Other
D&t Online: Levers
This site illustrates different classes of levers that are used in simple machines.
Other
Manhattan Beach Unified School District: Levers and Other Simple Machines
Learn about levers and make the connection between these simple machines and the human body.
CK-12 Foundation
Ck 12: Physical Science: Lever
[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.
Scholastic
Scholastic: Dirtmeister's Science Reporters: The Lever
This site provides a description of the lever and its many uses.
Scholastic
Scholastic: Dirtmeister's Science Lab: Levers
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.
Ohio University
Haptic Augmented Simple Machines: The Lever
An explanation of the three types of levers, with examples of each. The formula for the law of equilibrium is also demonstrated.
Khan Academy
Khan Academy: The Forearm as an Example of a Third Class Lever
This is a five-question quiz related to the passage "The Forearm as an Example of a Third-class Lever."
TED Talks
Ted: Ted Ed: The Mighty Mathematics of the Lever
Andy Peterson and Zack Patterson use the seesaw to illustrate the amazing implications and uses of the lever. [4:45]
Sophia Learning
Sophia: Levers & Work
A video tutorial showing the relationship between levers and work as it relates to mathematics. [4:33]
Science Education Resource Center at Carleton College
Serc: Levers: How the Human Body Uses Them to Its Advantage
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...
Integrated Publishing
Integrated Publishing: Levers
A quite lengthy chapter on the simple machine the lever. Includes uses, classes, mechanical advantage, formulae, etc. A full discussion, with good illustrations.
Science Education Resource Center at Carleton College
Serc: Levers:relationship of Force of Effort & Resistance Fulcrum Placement
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...
Alabama Learning Exchange
Alex: Levers Weight Lifters
During this activity, young scholars will have the opportunity to explore levers through hands-on experiences and by navigating the Internet. This activity allows students to use their experiences to determine how levers and other simple...
Science Education Resource Center at Carleton College
Serc: First Class Levers
Through observation and inquiry, learners are given various objects to investigate how levers work and why they might be useful.
PBS
Pbs: Nova: Lever an Obelisk
Help lift this Obelisk monument by designing a lever to do the job as efficiently as possible.
CK-12 Foundation
Ck 12: Plix: Boyle's Law: Lever
[Free Registration/Login Required] With the given shapes and labels, construct a second-class lever that would help in lifting very heavy items.
TeachEngineering
Teach Engineering: Levers That Lift
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...
Wikimedia
Wikipedia: Lever
Wikipedia offers excellent information on levers, including a hyperlinked table of contents, images, and examples.
Museum of Science
Museum of Science and Industry: Online Science: Build a 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.
Sophia Learning
Sophia: Simple Machines: Levers: Lesson 2
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."
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