## Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (3rd Edition)

Published by Pearson

# Chapter 2 - Kinematics in One Dimension - Conceptual Questions - Page 62: 5

#### Answer

(a) The velocity of an object is equal to the slope of the position versus time graph. At t = 1 s, the slope of the graph for object A is greater than the slope of the graph for object B, therefore, object A has a greater speed at t = 1 s. (b) There is one moment when the slopes of the two graphs are equal. At approximately t = 2.5 s, the slopes of the two graphs are equal. At this moment, the two have objects have the same speed.

#### Work Step by Step

(a) The velocity of an object is equal to the slope of the position versus time graph. At t = 1 s, the slope of the graph for object A is greater than the slope of the graph for object B, therefore, object A has a greater speed at t = 1 s. (b) There is one moment when the slopes of the two graphs are equal. At approximately t = 2.5 s, the slopes of the two graphs are equal. At this moment, the two have objects have the same speed.

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