2005F_2 - Physics 3221 Fall Term 2005 Test 2, November 4,...

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Physics 3221 Fall Term 2005 Test 2, November 4, 2005 This is an open notes test lasting 50 minutes. There are two problems. Problem 1 is worth 12 points and Problem 2 is worth 8 points. The points for each part are marked. Begin each problem on a fresh sheet of paper. Use only one side of a sheet of paper. 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 labeled figures are important. Randomly scrawled equations aren't helpful. Try to draw a box around important results. There are 2 pages including this page. Do not forget to look at all parts of the problems. Helpful integrals: = x x x xdx ln ln ∫∫ = 2 1 2 1 2 1 vdu v u udv
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1. A single stage rocket takes off from Earth (it’s a well designed rocket so it doesn’t waste any fuel sitting at the launch pad). The exhaust velocity is u , the initial mass (at time t = 0) is m 0 , and the fuel burn rate is a constant α .
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2005F_2 - Physics 3221 Fall Term 2005 Test 2, November 4,...

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