11th Edition

ISBN: 9781119573913

Author: Halliday

Publisher: WILEY

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Textbook Question

Chapter 10, Problem 54P

In a judo foot-sweep move, you sweep your opponent's left foot out from under him while pulling on his gi (uniform) toward that side. As a result, your opponent rotates around his right foot and onto the mat. Figure 10-44 shows a simplified diagram of your opponent as you face him, with his left foot swept out. The rotational axis is through point O. The gravitational force F g → on him effectively acts at his center of mass, which is a horizontal distance d = 28 cm from point O. His mass is 70 kg, and his rotational inertia about point O is 65 kg · m². What is the magnitude of his initial angular acceleration about point O if your pull F a → on his gi is (a) negligible and (b) horizontal with a magnitude of 300 N and applied at height h = l.4m?

Chapter 10, Problem 54P, In a judo foot-sweep move, you sweep your opponents left foot out from under him while pulling on

Figure 10-44 Problem 54.

Definition Definition Rate of change of angular velocity. Angular acceleration indicates how fast the angular velocity changes over time. It is a vector quantity and has both magnitude and direction. Magnitude is represented by the length of the vector and direction is represented by the right-hand thumb rule. An angular acceleration vector will be always perpendicular to the plane of rotation. Angular acceleration is generally denoted by the Greek letter α and its SI unit is rad/s 2 .

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Chapter 10, Problem 53P

Chapter 10, Problem 55P

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Chapter 10 Solutions

FUNDAMENTALS OF PHYSICS V.1

Ch. 10 - Figure 10-20 is a graph of the angular velocity...Ch. 10 - Figure 10-21 shows plots of angular position ...Ch. 10 - A force is applied to the rim of a disk that can...Ch. 10 - Figure 10-22b is a graph of the angular position...Ch. 10 - In Fig. 10-23, two forces F1 and F2 act on a disk...Ch. 10 - In the overhead view of Fig. 10-24, five forces of...Ch. 10 - Figure 10-25a is an overhead view of a horizontal...Ch. 10 - Figure l0-25b shows an overhead view of a...Ch. 10 - Figure 10-26 shows a uniform metal plate that had...Ch. 10 - Figure 10-27 shows three flat disks of the same...

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Solution Summary: The author explains how angular acceleration for both cases can be found. The rotational axis is at point O, and the gravitational force acts along the player's center of mass.

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