Physics: Principles with Applications (7th Edition)

Published by Pearson
ISBN 10: 0-32162-592-7
ISBN 13: 978-0-32162-592-2

Chapter 2 - Describing Motion: Kinematics in One Dimension - Questions - Page 41: 16

Answer

The slope of the position versus time curve is the velocity. The object starts at x=0 with a constant positive velocity (and zero acceleration), and moves that way for 20 s. Then, until t = 30s, the positive curvature of the position graph means that the object has a positive acceleration. Its velocity increases. From 30 s to about 45 s, the position graph has a negative curvature. It slows down to rest, changes direction, and then starts moving in the negative direction, faster and faster. From 45 s to 50 s, the positive curvature of the position graph means that the object has a positive acceleration. It is still moving in the negative direction, but slows down (i.e., positive acceleration).

Work Step by Step

The graph is a representation of motion expressed as position over time. Each change in the line's slope signifies a specific pattern of movement.
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.