Forces

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We've searched far and wide for the best physics worksheets, interactive online tools, and videos to help you learn everything you need to know about factors. Find a free resource today, and you'll stay at the head of your class.
A nice simulation of a pendulum. It also graphs the motion for you.

Explanations, formulae, and excellent illustrations covering the fundamentals of uniform circular motion and centripetal force.

This site provides a neat, concise, and lucid explanation of how to solve problems having to do with pulleys. It extends the simple explanation to include inertia; and, by extension, friction as well. Just substitute friction for inertia (Ia).

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