Physics Classroom
The Physics Classroom: Finding Individual Forces
Explore the world of finding individual forces. "The process of determining the value of the individual forces acting upon an object involve [sic] an application of Newton's Second law and an application of the meaning of the net force."
Discovery Education
Discovery Education: Science of Everyday Life: Don't Slip! [Pdf]
In this lesson plan students experience friction by sliding a block of wood over sandpaper. Students will experiment with frictional forces by measuring with spring scales or rubberbands.
Physics Classroom
The Physics Classroom: Newton's First Law of Motion
A clear explanation of Newton's First Law of Motion, the law of inertia, with diagrams and real-world examples. Useful for both students and teachers. Written by a high school physics teacher.
Physics Classroom
The Physics Classroom: Newton's Second Law of Motion
Learn more about finding acceleration through the practices found in this lesson. "The process of determining the acceleration of an object demands that the mass and the net force are known." Check out this comprehensive site.
Walter Fendt
Walter Fendt: Inclined Plane
This site is an interactive app of an inclined plane showing the effect of the angle, the weight of the block, and the friction as a block is pulled up an incline.
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.