pp18 - PHYSICS: A World View Thursday, 24 March 2005 READ...

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Unformatted text preview: PHYSICS: A World View Thursday, 24 March 2005 READ Ch 16 (p 323-330); PS 16: 1 PRAC Ch 15: Q 39, 43, 47, 51; E 17, 21 HW #18 Ch 15: Q 36, 46; E 20, 24 Tu 29 Mar LAB #11 Pendulums Pre=1 & 2 Resonance Mass on a spring Has one natural frequency Push at random times Motion is erratic with small amplitude Push at natural frequency Amplitude becomes very large Resonance Push at twice frequency Pushes cancel Push at half of natural frequency Obtain resonance Push at one-third of natural frequency Obtain resonance Obtain resonance for f = f natural / n Resonance A pendulum has a natural frequency of 2 Hz. Which of the following frequencies will not produce resonance? 1 2 3 100 1. 1 Hz 2. 2 Hz 3. 4 Hz 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 PULSE: traveling disturbance transfers energy and momentum no bulk motion of the medium (i.e., the stuff doesnt move!) come in two flavors Longitudinal the bits of stuff move back and forth in the direction of energy transport Longitudinal Pulse Longitudinal Pulse...
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This document was uploaded on 10/29/2011 for the course PHSX 103 at MSU Bozeman.

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pp18 - PHYSICS: A World View Thursday, 24 March 2005 READ...

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