10th Edition

ISBN: 9781118230725

Author: David Halliday, Robert Resnick, Jearl Walker

Publisher: Wiley, John & Sons, Incorporated

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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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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. The figure 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 Fg on him effectively acts at his center of mass, which is a horizontal distance d = 21 cm from point O. His mass is 73 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 Fa on his gi is (a) negligible and (b) horizontal with a magnitude of 300 N and applied at height h = 1.4 m? Assume free-fall acceleration to be equal to 9.81 m/s². (a) Number i Units (b) Number Units com F >

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. The figure 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 & on him effectively acts at his center of mass, which is a horizontal distance d = 23 cm from point O. His mass is 71 kg, and his rotational inertia about point O is 65 а g kg.m². What is the magnitude of his initial angular acceleration about point O if your pull Ễ, on his gi is (a) negligible and (b) horizontal with a magnitude of 300 N and applied at height h = 1.4 m? Assume free-fall acceleration to be equal to 9.81 m/s². (a) Number Units (b) Number Units com h

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Chapter 10 Solutions

Fundamentals of Physics Extended

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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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