Conceptual Physics: The High School Physics Program

9th Edition

ISBN: 9780133647495

Author: Paul G. Hewitt

Publisher: Prentice Hall

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Textbook Question

Chapter 12, Problem 12A

Momentum is conserved when there is no net external force. When is angular momentum conserved?

Expert Solution & Answer

To determine

The condition when the angular momentum of a system is conserved.

Answer to Problem 12A

In case of no external torque

Explanation of Solution

Introduction:

When there is no net external force on the considered system, then the momentum of the system remains conserved.

Similarly, when no external torque is exerted on a considered rotational system, then the angular momentum of the system remains conserved.

Conclusion:

Hence, the angular momentum remains same conserved in case of no external torque.

Chapter 12, Problem 11A

Chapter 12, Problem 13A

Chapter 12 Solutions

Conceptual Physics: The High School Physics Program

Ch. 12 - What is the law of inertia for rotation?Ch. 12 - Does the rotational inertia of an object differ...Ch. 12 - Which is easier to get swinging, a baseball bat...Ch. 12 - Which has a greater rotational inertia, a cylinder...Ch. 12 - Which will swing to and fro more often, a short...Ch. 12 - Why does bending your legs when running enable you...Ch. 12 - What are the three principal axes of rotation for...Ch. 12 - How does a skater decrease his or her rotational...Ch. 12 - Which will have the greater acceleration rolling...Ch. 12 - Distinguish between linear momentum and angular...

Ch. 12 - The text says that angular momentum is 10, then...Ch. 12 - Momentum is conserved when there is no net...Ch. 12 - What does it mean to Say that angular momentum is...Ch. 12 - If a skater who is spinning pulls her arms in so...Ch. 12 - If a skater who is spinning pulls her arms in so...Ch. 12 - Why are your answers different to the previous two...Ch. 12 - How can gravity be simulated in an orbiting space...Ch. 12 - How will the value of g vary at different...Ch. 12 - Three iron shapes of the same mass rotate about...Ch. 12 - Beginning from a rest position, a solid disk A, a...Ch. 12 - Perky rides at different radial distances from the...Ch. 12 - Students Art, Bart, Cis, and Dot sit on a rotating...Ch. 12 - Mei Fan says that a basketball has greater...Ch. 12 - Stand two metersticks against the wall and let...Ch. 12 - Why is a stick with a wad of clay at the top...Ch. 12 - Prob. 26A Ch. 12 - If you walked along the top of a fence, why would...Ch. 12 - Which will have the greater acceleration rolling...Ch. 12 - Any rolling object takes more time to roll down an...Ch. 12 - Jim says that in race between a can of water and a...Ch. 12 - Consider two rotating bicycle wheels, one filled...Ch. 12 - You sit in the middle of a large, freely rotating...Ch. 12 - A sizable quantity of soil is washed down the...Ch. 12 - If all of Earths inhabitants moved to the equator,...Ch. 12 - If the worlds populations move to the North and...Ch. 12 - If the polar ice caps of Earth were to melt, the...Ch. 12 - A toy train is initially at rest on a track...Ch. 12 - Why does a typical small helicopter with a single...Ch. 12 - We believe our galaxy was formed from a huge cloud...Ch. 12 - An occupant inside a rotating space habitat of the...Ch. 12 - Explain why the faster Earth spins, the less a...Ch. 12 - What happens to the rotational inertia of a simple...Ch. 12 - What happens to the rotational inertia of a simple...Ch. 12 - What happens to the rotational inertia of a simple...Ch. 12 - A pair of identical 1000-kg space pods in outer...Ch. 12 - The two-pod system in the previous question...Ch. 12 - Gretchen moves at a speed of 6.0 m/s when sitting...Ch. 12 - If a trapeze artist rotates twice each second...Ch. 12 - A 0.60-kg puck revolves at 2.4 m/s at the end of a...Ch. 12 - Gather a selection of canned foods. Predict which...

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