Q: A doubling of the torque produces a greater angular acceleration. Which
A doubling of the torque produces a greater angular acceleration. Which of the following would do this, assuming that the tension in the rope doesn’t change? (a) Increasing the pulley diameter by a fa...
See AnswerQ: If the body’s center of mass were not placed on the rotational
If the body’s center of mass were not placed on the rotational axis of the turntable, how would the person’s measured moment of inertia compare to the moment of inertia for rotation about the center o...
See AnswerQ: His body is again leaning back at 30.0° to
His body is again leaning back at 30.0° to the vertical, but now the height at which the rope is held above—but still parallel to—the ground is varied. The tension in the rope in front of the competit...
See AnswerQ: His body is leaning back at 30.0° to the
His body is leaning back at 30.0° to the vertical, but the coefficient of static friction between his feet and the ground is suddenly reduced to 0.50. What will happen? (a) His entire body will accele...
See AnswerQ: If the elephant were to snorkel in salt water, which is
If the elephant were to snorkel in salt water, which is more dense than freshwater, would the maximum depth at which it could snorkel be different from that in freshwater? (a) Yes—that depth would inc...
See AnswerQ: Can a single force applied to a body change both its translational
Can a single force applied to a body change both its translational and rotational motions? Explain.
See AnswerQ: Car tires are sometimes “balanced” on a machine that pivots
Car tires are sometimes “balanced” on a machine that pivots the tire and wheel about the center. Weights are placed around the wheel rim until it does not tip from the horizontal plane. Discuss this p...
See AnswerQ: You push a piece of wood under the surface of a swimming
You push a piece of wood under the surface of a swimming pool. After it is completely submerged, you keep pushing it deeper and deeper. As you do this, what will happen to the buoyant force on it? Wil...
See AnswerQ: Does the center of gravity of a solid body always lie within
Does the center of gravity of a solid body always lie within the material of the body? If not, give a counter example.
See AnswerQ: When an acrobat walks on a tightrope, she extends her arms
When an acrobat walks on a tightrope, she extends her arms straight out from her sides. She does this to make it easier for her to catch herself if she should tip to one side or the other. Explain how...
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