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Unformatted text preview: reddy (ar38357) Angular Momentum clancy (SCI411-2) 1 This print-out should have 7 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. 001 10.0 points A basketball player wishes to balance a ball on his fingertip. Will he be more successful with a spinning ball or a stationary ball? What physical prin- ciple supports your answer? 1. the spinning ball; angular momentum correct 2. the stationary ball; inertia 3. the stationary ball; angular momentum 4. the spinning ball; inertia Explanation: The basketball will more easily balance when spinning, just as a spinning top is eas- ier to balance. Once spinning about an axis, an object tends to be more stable about that axis (the principle of rotational inertia). 002 10.0 points An airplane of mass 998 kg flies level to the ground at a constant speed of 175 m / s relative to the Earth. An observer on the ground along the path of the plane sees the plane a distance 9430 . 56 m away at an angle above the horizontal of 62 . 964 . What is the magnitude of the airplanes angular momentum relative to a ground ob- server directly below the airplane?...
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