Ch 12: Rotation of a Rigid Body
Chapter 12, Problem 12
The object shown in FIGURE EX12.29 is in equilibrium. What are the magnitudes of F1 and F2
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Textbook Question
A 1.0 kg ball and a 2.0 kg ball are connected by a 1.0-m-long rigid, massless rod. The rod is rotating cw about its center of mass at 20 rpm. What net torque will bring the balls to a halt in 5.0 s?
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Textbook Question
A 12-cm-diameter, 600 g cylinder, initially at rest, rotates on an axle along its axis. A steady 0.50 N force applied tangent to the edge of the cylinder causes the cylinder to reach an angular velocity of 500 rpm in 2.0 s. What is the magnitude of the frictional torque between the cylinder and the axle?
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Textbook Question
A 4.0-m-long, 500 kg steel beam extends horizontally from the point where it has been bolted to the framework of a new building under construction. A 70 kg construction worker stands at the far end of the beam. What is the magnitude of the torque about the bolt due to the worker and the weight of the beam?
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Textbook Question
Vector A = 3î+ĵ and vector B= 3î ─ 2ĵ + 2k. What is the cross product A ✕ B?
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Textbook Question
Evaluate the cross products and A ✕ B and C ✕ D.
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Textbook Question
A small 300 g ball and a small 600 g ball are connected by a 40-cm-long, 200 g rigid rod.
b. What is the rotational kinetic energy if the structure rotates about its center of mass at 100 rpm?
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