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EXERCISES & PROBLEMS ssm Solution is in the Student Solutions Manual. WW’tI Solution is available on the World Wide Web at: http://www.wiley.com/colleg~/hrw Ilw Solution is available on the Interacuve LcamingWare. ROLLING IE. An automobile traveling 80.0 km/h has tires of 75.0 cm diam (a) What is the  angular speed of the tires about their axles’! (b) If […]

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REVIEW & SUMMARY Torque as a Vector In three dimensions. torque T’ is a vector quantity defined relative to a fixed point. Angular Momentum of a Particle The angular momentum f of a particle with linear momentum p. mass m, and linear velocity is a vector quantity defined relative to a fixed point (usually an origin). Newton’s Second Law […]

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Sample Problem (This final sample problem of the chapter is long and challenging, but it is helpful because it pulls together many ideas of Chapters II and 12.) In the overhead view of four thin. uniform rods. each of mass M and length are rigidly connected  to a vertical axle to form a turnstile. SOLUTION: A Key Idea […]

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Sample Problem During a jump to his pannier. an aerialist is 10 make a quadruple somersault lasting a lime I = 1.87 s, For the first and quarter revolution. he is in the extended orientation shown in around his center of mass the dot). During the rest of the is in a tight luck. with rotational inertia 12 = […]

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Sample Problem Shows a student, again sitting on a .stool that can rota  freely about a venial axis. The student, initially at rest. is holding a bicycle wheel whose rim is loaded with lead and whose rotational inertia about its central axis is 1.2 kg· SOLUTION: The Key Ideas her are these: I. The angular speed we seek […]

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Conservation of Angular Momentum So far we have discuss.:d two powerful conservation laws. the conservation of energy and the conservation of linear momentum. Now we meet a third law of this type,the  of angular momentum. We start from . which is Newtons second law angular form. If no net external torque acts on the system. this equation. […]

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The Angular Momentum of a Rigid Body Rotating About a Fixed Axis We next evaluate the angular momentum of a system of particles that form a rigid body that rotates about a fixed axis. A shows such a body. The fixed axis of rotation is the: axis, and the body rotates about it with constant angular speed w. We wish […]

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The Angular Momentum of a System Of Particles Now we turn our attention 10 the angular momentum of a system of particles with respect to an origin. The total angular momentum L of the system is the (vector) sum of the angular momenta f of the individual particles. With time, the angular momenta of individual particles may change. […]

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Sample Problem A penguin of mass m falls from rest at point A, a horizontal distance D from the origin 0 of an coordinate system. (The positive direction of the = axis is directly outward from the plane of the figure.) (a) What is the angular momentum f of the falling penguin about. SOLUTION: One Key Idea here is that […]

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Newton’s Second Law In Angular Form Expresses the close relation between force and linear momentum for a single particle. We have seen enough of the parallelism between linear and angular quantities to be pretty sure that there is also a close relation between torque and angular momentum. Guided by , we can even guess that it must be. […]