University of California
Ucla: Speed and Velocity
Discusses the meaning of velocity in terms of a graphical representation. Calculus-based discussion. Good graphics.
CK-12 Foundation
Ck 12: Physics: Motion Study Guide
This study guide on motion covers some key vocabulary and terms to describe motion: displacement vs. distance, acceleration, speed vs. velocity, and instantaneous vs. average. It includes graphs showing distance vs. time, velocity vs....