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p140w07_ct_23 - Racquetball Striking a Wall Copyright Loren...

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Physics 140: Winter 2007 Lecture #22 April 3, 2007 Dave Winn Racquetball Striking a Wall Copyright: Loren M. Winters Mt. Etna Andrew Davidhazy
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Exam information Third exam: Thursday April 5th from 6-7:30 PM Bring a calculator Bring three 3”x5” cards with whatever you want to remember (both sides OK) Where to take the exam? – Same place you took exam 2. Exam covers 10.3-14.5 (but not sections 12.6-12.8)
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Bridge motion is really wave motion Each part of the bridge oscillates in a coordinated way A set of closely coupled oscillators Disturbances travel up and down the bridge
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Coupled oscillators and waves The bridge exhibits wave motion: disturbances travel up and down it Waves happen in systems of coupled oscillators: material in each spot just oscillates back and forth The first oscillator shakes the second, transferring energy to it…
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