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New Jersey / American Association of Physics Teachers
This New Jersey Section of the American Association of Physics Teachers contains the usual information about its goals, organization, and membership. However, its greatest value is its inclusion of lesson plans for teachers, sample tests...
Physics Classroom
The Physics Classroom: Inertia and Mass
This is part of a lesson on Newton's Laws of Motion that focuses on inertia and mass. It restates Newton's first law of motion. The lesson also gives a helpful visual description concerning friction.