09_InstSolManual_PDF_Part1 - ROTATIONAL MOTION 9 8 A C 9 C...

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9-1 R OTATIONAL M OTION 9 Answers to Multiple-Choice Problems 1. B 2. D 3. C 4. C 5. A 6. D 7. B 8. A, C 9. C 10. C 11. C 12. A 13. B 14. A 15. A 16. A Solutions to Problems 9.1. Set Up: gives in radians. Solve: 9.2. Set Up: with in radians. Solve: (a) (b) (c) 9.3. Set Up: For one revolution, Assume constant angular velocity, so The second hand makes 1 revolution in The minute hand makes 1 revolution in and the hour hand makes 1 revolution in Solve: (a) second hand minute hand hour hand (b) The period is the time for 1 revolution. Second hand, 1min; minute hand, 1 h; hour hand, 12 h. Reflect: When the angular velocity is constant, 9.4. Set Up: is the angular speed. Solve: (a) (b) For 1 rev, 9.5. Set Up: Solve: (a) The period is the time for 1 rev, so period 5
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