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Unformatted text preview: PHYSICS 002C Lecture 03 April 03, 2009 Serway and Jewett Chapter 12 Oscillatory Motion Office hours for Prof. Mills: After class on the way to my office Physics 3023, + e-mail + see if I am not busy. Review - Chap 12.1,2 Motion of a particle on a spring: Hookes law : kx F s- = Combine Hookes law and Newtons 2 nd law to get x dt x d 2 2 2 / - = , where m k / 2 = Solution: ) cos( + = t A x harmonic = sinusoidal motion, a consequence of Hookes law. simple = only one mode is excited. Review - Chap 12.3 Energy of simple harmonic motion 2 2 1 mv K = ; 2 2 1 kx U = ; 2 2 1 kA E = ; ) ( 2 2 2 1 2 2 1 x A k mv- = ; ) ( 2 2 x A v- = Q: What is the frequency of the DEMO oscillator with k = 10 N/m and m = 0.5 kg? a) 700 Hz, b) 70 mHz, c) 70 kHz, d) 0.7 Hz; e) 7 Hz. Chap 12.4 Simple pendulum Angular frequency for small amplitudes is l g / = , analogous to m k / = ....
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This note was uploaded on 06/08/2009 for the course PHYS 2c taught by Professor All during the Spring '08 term at UC Riverside.
- Spring '08