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Get Full Access to Conceptual Physics - 12 Edition - Chapter 3 - Problem 39e
Get Full Access to Conceptual Physics - 12 Edition - Chapter 3 - Problem 39e

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# A ball tossed upward will return to the same point with

ISBN: 9780321909107 29

## Solution for problem 39E Chapter 3

Conceptual Physics | 12th Edition

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Conceptual Physics | 12th Edition

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Problem 39E

A ball tossed upward will return to the same point with the same initial speed when air resistance is negligible. When air resistance is not negligible, how does the return speed compare with its initial speed?

Step-by-Step Solution:

Solution 39E Introduction In this problem we will use the concept conservation of energy to answer and the fact that due to air resistance the ball will lose some energy to whether the ball will have same velocity or not. Solution Step 1: Explanation. When I am tossing some ball upwards, I am throwing the ball with some velocity. That means, initially I am giving some kinetic energy to the ball. Now if there is no air resistance, as the ball goes up, the kinetic energy will be converted to potential energy and at the top of the flight, the all the kinetic energy will be converted to potential energy and the ball have only potential energy. And when, now when the ball is coming down, the potential energy will now, again, be converted to kinetic energy and at the starting point all the potential energy will be converted to kinetic energy again. Since, since the gravity is a conservative force, the total energy of the ball will remain always conserved. And since the kinetic energy of the ball depends on the velocity and the mass of the ball, the velocity will be same. Now when there is air resistance, which is not a conservative force, the ball will loose some energy during it’s flight due to friction. Now when the ball returns to the initial position, the ball will have only kinetic energy, but the ball has already lost some energy due to air resistance. So at this point the kinetic energy is less than the initial energy. Hence the velocity will be less than the initial velocity.

Step 2 of 2

##### ISBN: 9780321909107

The full step-by-step solution to problem: 39E from chapter: 3 was answered by , our top Physics solution expert on 04/03/17, 08:01AM. Conceptual Physics was written by and is associated to the ISBN: 9780321909107. This textbook survival guide was created for the textbook: Conceptual Physics, edition: 12. The answer to “A ball tossed upward will return to the same point with the same initial speed when air resistance is negligible. When air resistance is not negligible, how does the return speed compare with its initial speed?” is broken down into a number of easy to follow steps, and 36 words. This full solution covers the following key subjects: speed, initial, return, air, resistance. This expansive textbook survival guide covers 45 chapters, and 4650 solutions. Since the solution to 39E from 3 chapter was answered, more than 399 students have viewed the full step-by-step answer.

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