HW 22 - Morby Grant – Homework 22 – Due noon – Inst...

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Unformatted text preview: Morby, Grant – Homework 22 – Due: Mar 27 2006, noon – Inst: Drummond 1 This print-out should have 11 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. The due time is Central time. 001 (part 1 of 2) 10 points Two objects, of masses 21 kg and 28 kg, are connected to the ends of a rigid rod (of negli- gible mass) that is 70 cm long and has marks every 10 cm, as shown. 21 kg 28 kg A B C D E F G H J 10 20 30 40 50 60 Which of the nine lettered points represents the center of mass of the sphere-rod combina- tion? 1. J 2. F 3. H 4. D 5. B 6. C 7. A 8. E 9. G 002 (part 2 of 2) 10 points The sphere-rod combination can be pivoted about an axis that is perpendicular to the plane of the page and that passes through one of the five lettered points. Through which point should the axis pass for the moment of inertia of the sphere-rod combination about this axis to be greatest? 1. G 2. A 3. J 4. C 5. F 6. H 7. E 8. B 9. D 003 (part 1 of 1) 10 points Consider three objects of equal masses but different shapes: a solid disk, a thin ring, and a thin hollow square. The sizes of the three objects are related according to the following picture disk R ring R square 2 R Note: The ring and the square are hollow and their perimeters carry all the mass, but the disk is solid and has uniform mass density...
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HW 22 - Morby Grant – Homework 22 – Due noon – Inst...

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