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Chapter 2: Motion in a Straight Line

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Physics explains the movement of everything from people to a space shuttle

Credit: Courtesy of NASA
Source: http://commons.wikimedia.org/wiki/File:STS-30_launch.jpg
License: CC BY-NC 3.0

Everything in our universe moves. People, planets, and even galaxies are in constant motion. Physics gives us ways to explain motion using not only words, but also equations and graphs. This description of motion, called “kinematics,” involves properties such as position, speed, velocity, and acceleration. In this chapter, you will explore kinematics in one dimension.

Chapter Outline

Chapter Summary

The first thing physics is used to describe is motion. Motion is characterized by position, displacement, distance, speed, velocity, and acceleration. Kinematic equations show how these properties are linked; the three equations given in this chapter can be used, assuming constant acceleration, to determine the relationship between an object’s displacement, velocity, and acceleration.

Image Attributions

  1. [1]^ Credit: Courtesy of NASA; Source: http://commons.wikimedia.org/wiki/File:STS-30_launch.jpg; License: CC BY-NC 3.0

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Date Created:

Oct 11, 2013

Last Modified:

Jul 10, 2014
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