Science - Physics

Describing Motion: Velocity

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If you're studying motion and velocity, you've come to the right place. You can watch a free physics video to refresh your memory before a test, experiment with sophisticated online modeling tools, or just practice a few problems with a free worksheet.

Introduction to motion (part 3)

In this video, Salman Khan of Khan Academy introduces the basic concepts of motion. Part 3 of 3.

Khan Academy

Oscillations

Includes information on oscillations, simple harmonic motion, period, Hooke's Law, and energy with mass-spring systems. Many diagrams and equations.

Spark Notes

Position, Velocity and Acceleration Explained

A clear explanation of position, velocity and acceleration with an interactive demonstration where one chooses the initial conditions for two objects and then watches them move as time goes by.

Fear of Physics: Physics Explained Finally

Trajectories

This site has tutorials on various trajectory problems. It includes interactive trajectory calculators.

Trajectories

Rotational Dynamics: Pulleys

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).

Physics Lab Online

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Science - Physics

Describing Motion: Velocity

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