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# In Example 10.10 (Section 10.6) the rotational kinetic

ISBN: 9780321675460 31

## Solution for problem 24DQ Chapter 10

University Physics | 13th Edition

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Problem 24DQ

In Example 10.10 (Section 10.6) the rotational kinetic energy of the professor and dumbbells increases. But since there are no external torques, no work is being done to change the rotational kinetic energy. Then, by Eq. (10.22), the kinetic energy must remain the same! Explain what is wrong with this reasoning that leads to this apparent contradiction. Where ?does ?the extra kinetic energy come from?

Step-by-Step Solution:

Step 1: The kinetic energy of the professor and dumbbells increases as he pulls his hands near his chest. The increase in kinetic energy does not require the external torque or work. When the professor pulls his hand the moment of inertia...

Step 2 of 3

Step 3 of 3

##### ISBN: 9780321675460

The answer to “In Example 10.10 (Section 10.6) the rotational kinetic energy of the professor and dumbbells increases. But since there are no external torques, no work is being done to change the rotational kinetic energy. Then, by Eq. (10.22), the kinetic energy must remain the same! Explain what is wrong with this reasoning that leads to this apparent contradiction. Where ?does ?the extra kinetic energy come from?” is broken down into a number of easy to follow steps, and 65 words. Since the solution to 24DQ from 10 chapter was answered, more than 441 students have viewed the full step-by-step answer. This full solution covers the following key subjects: Energy, kinetic, rotational, increases, contradiction. This expansive textbook survival guide covers 26 chapters, and 2929 solutions. The full step-by-step solution to problem: 24DQ from chapter: 10 was answered by , our top Physics solution expert on 05/06/17, 06:07PM. This textbook survival guide was created for the textbook: University Physics, edition: 13. University Physics was written by and is associated to the ISBN: 9780321675460.

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