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exam3_sol - PHY 3221 Mechanics I Fall Term 2010 Midterm...

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Unformatted text preview: PHY 3221: Mechanics I Fall Term 2010 Midterm Exam 3, December 1, 2009 • This is a closed book exam lasting 50 minutes. • Since calculators are not allowed on this test, if the problem asks for a numerical answer, answering 2 + 2 is as good as 4, and √ 2 is as good as 1 . 4142 ... . • There are three problems and two multiple choice questions worth a total of 20 pts. Begin each problem on a fresh sheet of paper. Use only one side of the paper. Avoid microscopic handwriting. • Put your name, the problem number and the page number in the upper right-hand corner of each sheet. • To receive partial credit you must explain what you are doing. Carefully labelled figures are important! Randomly scrawled equations are not helpful. • Draw a box around important results (or at least results which you think might be im- portant). • Good luck! 1 Problem 1. [2 pts] Which of the figures below depicts the response of a damped harmonic oscillator to a forcing function which is a single spike (delta function) applied at t = 0? A. Figure (a) B. Figure (b) C. Figure (c) D. Figure (d) E. Figure (e) Minus 30 Minus 20 Minus 10 10 20 30 Minus 2 Minus 1 1 2 t x LParen1 t RParen1 Figure LParen1 a RParen1 Minus 30 Minus 20 Minus 10 10 20 30 Minus 2 Minus 1 1 2 t x LParen1 t RParen1 Figure LParen1 b RParen1 Minus 20 20 40 Minus 0.5 0.0 0.5 1.0 1.5 t x LParen1 t RParen1 Figure LParen1 c RParen1 Minus 10 10 20 30 40 50 Minus 30 Minus...
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exam3_sol - PHY 3221 Mechanics I Fall Term 2010 Midterm...

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