It's About Time
The Mu of the Shoe
What is mu? Emerging scientists explore the coefficient of sliding friction, or mu, and apply its concepts as they complete activities in the interesting lesson. They measure the sliding friction between soles of their own athletic shoes...
Utah Education Network (UEN)
Microwave Magic
The microwave is a staple in many American households, but how exactly does it work? Approach this question from a scientific and practical standpoint, and discover cooking strategies, recipes, and methodologies for the standard...
Oregon State
World Map of Plate Boundaries
Young geologists piece together the puzzle of plate tectonics in an earth science lesson. Given a physical map of the world, they search for land formations that indicate the location of different types of plate boundaries.
It's About Time
Run and Jump
Has your class wondered how fast a human could run or how high they are capable of jumping? Help them understand these concepts as they explore acceleration and use an accelerometer to make semiquantitative measurements of acceleration...
Teach Engineering
Tippy Tap Plus Piping
Getting water to a tap requires an understanding the fundamentals of fluid flow. Groups design, build, and test a piping system to get water from the source — a five gallon bucket — to a tippy tap. The objective is to be able to...
University of Alaska
University of Alaska Fairbanks: Static and Kinetic Friction
Explains what static and kinetic friction are, what their coefficients of friction are in different scenarios, and how these concepts are applied when looking at automobile braking distances and vehicle control when driving.
Khan Academy
Khan Academy: What Is Friction?
Learn about the force of friction on this reference page which defines why friction is important and how it can change physic problems.
Texas Education Agency
Texas Gateway: Glossary for Newton's Laws: Friction, Drag, and Elasticity
This is a glossary of terms and definitions used in Chapter 5: Further Applications of Newton's Laws: Friction, Drag, and Elasticity from the AP Physics online text.
Science Struck
Science Struck: Static Friction vs. Kinetic Friction: The Differences
Teaches what friction force is, the difference between static and kinetic friction, and how friction force is calculated.
Science4Fun
Science4 Fun: What Is Friction
What is friction? Illustrated discussion of friction including the three types, its importance, and why it is avoided.
Physics4kids
Physics4 kids.com: Friction Basics
This resource provides a brief overview of friction. Its' affects on solids, liquids and gases is described with diagrams. An explanation of how friction is measured is included in the discussion. An online quiz can be used to check your...
Georgia State University
Georgia State University: Hyper Physics: Air Friction
Physics lab definition of air fiction. Part of a hypertext physics course on sound.
Other
Amos Web Encyclonomic: Frictional Unemployment
Provides a definition of the economic term, "frictional unemployment."
University of St. Andrews (UK)
University of St. Andrews: Charles Augustin De Coulomb
A large complete authoritative biography of Coulomb. Five large pictures, over a dozen links to contemporaries, references, a poster, other mathematicians. A fine source.
Science Struck
Science Struck: A Comprehensive List of All the Physics Formulas
Provides a long list of physics formulas for easy reference.
CK-12 Foundation
Ck 12: Physics: Newton's Laws Study Guide
This study guide on Newton's Laws covers key terms, the three laws, free body diagrams, friction coefficients and tension. Includes equations and an example problem with solution. It is available for download with free registration.
American Association of Physics Teachers
Com Padre Digital Library: Open Source Physics: Sliding Down an Incline Plane
Here is a simulation demonstrating an object placed on an inclined plane. The user will vary the slope of the plane to see the relationship the slope has on the gravity of the object and the static friction.
Scholastic
Scholastic: Dirtmeister's Science Reporters: Simple Machines: The Wheel and Axle
An in-depth explanation of the wheel and axle from Scholastic. Also provides several examples and a picture for understanding.
Physics4kids
Physics4 Kids: Thermodynamics and Heat: Heat
Explains how heat is created from a chemical reaction, from friction, or from energy inefficiency, as well as the meaning of specific heat capacity.
University of Illinois
University of Illinois Urbana Champaign: Forces and Winds
What causes wind? How does wind affect our weather? This website is neatly organized into topics about pressure, gradient force, Coriolis force, geostrophic wind, gradient wind, friction, boundary layer wind, and sea and land breezes....
eSchool Today
E School Today: All About Forces
Forces are everywhere. Learn what they are, the characteristics of forces, different kinds of forces, and factors that affect them.
Khan Academy
Khan Academy: What Are Inclines?
A webpage with equations and examples of how to solve inclined planes problems. Learn how to deal with slopes when surfaces usually aren't perfectly horizontal.
Lone Star Junction
Lone Star Junction: Texan Santa Fe Expedition (1841)
Describes the ambitious but unsuccessful trade expedition from Texas to Santa Fe in 1841 that was devised by President Lamar. It contributed to the growing friction between Texas and Mexico.
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