The document discusses motion and velocity in one dimension. It provides examples of calculating velocity and displacement when traveling at a constant speed in a single direction, as well as calculating average velocity over time periods when speed may vary. It defines velocity as a vector quantity that includes both speed and direction, while speed only refers to magnitude. It also discusses concepts such as instantaneous and continuous velocity, and introduces the idea of using the area under a velocity-time graph to determine displacement when velocity is changing continuously with constant acceleration.

1. Physics 130 Lecture 10 Motion-Velocity In one dimension Chapter 2