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Ohio State University
Ohio State Univ.: Simple Machines & Mechanical Advantage [Pdf]
This site details how simple machines create a mechanical advantage for humans. Levers, theoretical mechanical advantage, actual mechanical advantage, and pulley systems are discussed.
The Franklin Institute
Spotlighting Simple Machines
Simple machines such as inclined planes in wedges and screws are explained.
Science Struck
Science Struck: Simple Machines: The Wedge
Explains how a wedge works, the formula for calculating its mechanical advantage, and some common applications of wedges.
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.
Science Struck
Science Struck: Simple Machine: All About the Wheel and Axle
Describes some history of the wheel and axle, how it works, the formula for calculating its mechanical advantage, and some applications of the wheel and axle.
Science Struck
Science Struck: Simple Machines: Pulley Systems
Describes some history of the pulley, how it works, the formula for calculating its mechanical advantage, types of pulley systems, and some applications of pulleys.
Utah Education Network
Uen: Force, Energy, and Motion: Complex Machines for Simple Tasks!
Designed for Grade Eight, this collection of lessons provides information, examples and quizzes related to simple machines. Elementary students studying this topic will find this site informative as well.
Scholastic
Scholastic: Dirtmeister's Science Reporters: Simple Machines: Pulley
With-it explanation of how the pulley works, where it's found. Most interesting, as Scholastic material usually is.
Scholastic
Scholastic: Dirtmeister: The Inclined Plane
This site from Dirtmeister gives information on how the Ancient Egyptians used the inclined plane. Dirtmeister explains the inclined plane and its uses.
Science Struck
Science Struck: Examples of Pulleys in Daily Life
Learn how pulleys work and their many uses in everyday life, industry, recreation, and other activities. Includes many pictures of pulleys and pulley systems.