http://www.ck12.org Chapter 2. One-Dimensional Motion
CHAPTER
2 One-Dimensional Motion
Chapter Outline
2.1 Position and Displacement
2.2 AVERAGEVELOCITY
2.3 VELOCITY ANDACCELERATION
2.4 GRAPHINGMOTION
2.5 MOTION
Introduction
The Big Idea
One dimensional motion describes objects moving in straight lines. Speed is a scalar measure of how quickly
an object is moving along this line. Velocity is speed with a direction, making it a vector. If an object’s velocity
changes with time, the object is said to be accelerating. When restricted to one dimension, there are only two possible
directions for the velocity and acceleration vectors to point in. As we’ll see in the next chapters, understanding an
object’s acceleration is the key to understanding its motion.