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A ball moves in a straight line (the x-axis). The graph in

University Physics | 13th Edition | ISBN: 9780321675460 | Authors: Hugh D. Young, Roger A. Freedman ISBN: 9780321675460 31

Solution for problem 9E Chapter 2

University Physics | 13th Edition

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University Physics | 13th Edition | ISBN: 9780321675460 | Authors: Hugh D. Young, Roger A. Freedman

University Physics | 13th Edition

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Problem 9E

A ball moves in a straight line (the x-axis). The graph in ?Fig. E2.9 shows this ball’s velocity as a function of time. (a) What are the ball’s average speed and average velocity during the first 3.0 s? (b) Suppose that the ball moved in such a way that the graph segment after 2.0 s was - 3.0 m/s instead of + 3.0 m/s. Find the ball’s average speed and average velocity in this case.

Step-by-Step Solution:

Solution 9E Step 1: a) Average speed, s = Total distance travelled by the object/Total time In this problem, the velocity of the ball in first two seconds is, v = 2 m/s 1 Therefore, the total distance travelled by the object at first two seconds, d = v t 1 1 1 d = 2 m/s × 2 s = 4 m 1 The total distance travelled by the object in between 2nd and 3rd second is, d = v t 2 2 2 d = 3 m/s × 1 s = 3 m 2 Therefore, the total distance travelled by the object, d = d + d = 4 m + 3 m = 7 1 2 Total time taken, t = t + t =1 s +2 s = 3 s Average speed of the ball, s = 7 m / 3 s = 2.33 m/s

Step 2 of 4

Chapter 2, Problem 9E is Solved
Step 3 of 4

Textbook: University Physics
Edition: 13
Author: Hugh D. Young, Roger A. Freedman
ISBN: 9780321675460

The full step-by-step solution to problem: 9E from chapter: 2 was answered by , our top Physics solution expert on 05/06/17, 06:07PM. Since the solution to 9E from 2 chapter was answered, more than 4519 students have viewed the full step-by-step answer. This full solution covers the following key subjects: ball, average, velocity, speed, graph. This expansive textbook survival guide covers 26 chapters, and 2929 solutions. The answer to “A ball moves in a straight line (the x-axis). The graph in ?Fig. E2.9 shows this ball’s velocity as a function of time. (a) What are the ball’s average speed and average velocity during the first 3.0 s? (b) Suppose that the ball moved in such a way that the graph segment after 2.0 s was - 3.0 m/s instead of + 3.0 m/s. Find the ball’s average speed and average velocity in this case.” is broken down into a number of easy to follow steps, and 75 words. University Physics was written by and is associated to the ISBN: 9780321675460. This textbook survival guide was created for the textbook: University Physics, edition: 13.

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