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A 1100-kg car coasts on a horizontal road with a speed of

Physics with MasteringPhysics | 4th Edition | ISBN: 9780321541635 | Authors: James S. Walker ISBN: 9780321541635 54

Solution for problem 28P Chapter 7

Physics with MasteringPhysics | 4th Edition

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Physics with MasteringPhysics | 4th Edition | ISBN: 9780321541635 | Authors: James S. Walker

Physics with MasteringPhysics | 4th Edition

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Problem 28P

Problem 28P

A 1100-kg car coasts on a horizontal road with a speed of 19 m/s. After crossing an unpaved, sandy stretch of road 32 m long, its speed decreases to 12 m/s. (a) Was the net work done on the car positive, negative, or zero? Explain. (b) Find the magnitude of the average net force on the car in the sandy section.

Step-by-Step Solution:

Solution 28P:

Step 1 of 3:-

Here we need to find whether the work done is positive, negative or zero.

The mass of the car is: .

The initial speed was: .

After crossing the sandy road, the final speed became,

.

Step 2 of 3

Chapter 7, Problem 28P is Solved
Step 3 of 3

Textbook: Physics with MasteringPhysics
Edition: 4
Author: James S. Walker
ISBN: 9780321541635

Physics with MasteringPhysics was written by and is associated to the ISBN: 9780321541635. This full solution covers the following key subjects: Car, Sandy, speed, road, Net. This expansive textbook survival guide covers 32 chapters, and 3833 solutions. The full step-by-step solution to problem: 28P from chapter: 7 was answered by , our top Physics solution expert on 07/27/17, 10:59AM. The answer to “A 1100-kg car coasts on a horizontal road with a speed of 19 m/s. After crossing an unpaved, sandy stretch of road 32 m long, its speed decreases to 12 m/s. (a) Was the net work done on the car positive, negative, or zero? Explain. (b) Find the magnitude of the average net force on the car in the sandy section.” is broken down into a number of easy to follow steps, and 61 words. This textbook survival guide was created for the textbook: Physics with MasteringPhysics, edition: 4. Since the solution to 28P from 7 chapter was answered, more than 4178 students have viewed the full step-by-step answer.

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