fall10_f - Dr. Gundersen and Dr. Galeazzi Signature:...

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Dr. Gundersen and Dr. Galeazzi Physics 205 Final Exam 11 December 2010 Signature: Name: 1 2 3 4 5 6 7 Idnumber: You must do the frst two problems. Each oF the frst two problems consists oF fve multiple choice questions. Then you can skip one oF the fve long problems numbered 3-7. Clearly cross out the page and the numbered box oF the problem omitted. Do not write in the other boxes. IF you do all the problems, only problems 1-6 will be graded. Each problem is worth 25 points For a total oF 150 points. A Formula sheet is provided on the LAST 2 pages which you can tear o±. TO GET PARTIAL CREDIT IN PROBLEMS 3 - 7 YOU MUST SHOW GOOD WORK. CHECK DISCUSSION SECTION ATTENDED: [ ] Dr. Galeazzi 1O, 9:30 - 10:20 a.m. [ ] Dr. Voss 1P, 11:00 - 11:50a.m. [ ] Dr. Hufenberger 1Q, 12:30 - 1:20 p.m. [ ] Dr. Barnes 1R, 2:00 - 2:50 p.m. [ ] Dr. Gundersen 1S, 3:30 - 4:20 p.m. [ ] Dr. Nepomechie 3O, 9:30 - 10:20 a.m. [ ] Dr. Voss 3Q, 12:30 - 1:20 p.m. Physics 205 Final Exam 11 December 2010
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Dr. Gundersen and Dr. Galeazzi Physics 205 Final Exam 11 December 2010 [1.] This problem has fve multiple choice questions. Circle the best answer in each case. [1A.] Due to the residual drag o± the atmosphere, a satellite in orbit around the Earth slowly moves closer to the Earth’s sur±ace. Which o± the ±ollowing statements about the satellite is correct? [a] Both kinetic and potential energy increase. [b] The kinetic energy increases while the potential energy decreases. [c] The kinetic energy decreases while the potential energy increases. [d] Both kinetic and potential energy decrease. [e] Both kinetic and potential energy stay the same. [1B.] On a table o± materials you fnd that, ±or rubber, Young’s modulus is Y = 2 × 10 5 Pa, while the proportional limit is 1 × 10 2 Pa. You start pulling on a 1 m long rubber band while measuring its length. Which o± the ±ollowing statements is correct? [a] It is impossible to determine in advance when you reach the proportional limit without knowing the cross-sectional area o± the band. [b] It is impossible to determine in advance when you reach the proportional limit without knowing the ±orce applied. [c] You will reach the proportional limit when the band is 1% longer. [d] It is impossible to determine in advance when you reach the proportional limit without knowing the ±orce applied AND the cross-sectional area. [e] You will reach the proportional limit when the band is 0 . 05% longer. [1C.] A particle o± mass m is subject to a ±orce that changes with time as v F ( t ) = αt ˆ i - βt 2 ˆ j , where α and β are positive constants. I± the particle is initially at rest at the origin with zero intial velocity, how ±ar is it ±rom the origin at time t ? [a] t 3 m r α 2 + β 2 t 2 [b] t 3 6 m ( α - βt 2 ) [c] t 3 2 m R α 2 + β 2 t 2 9 [d] t 3 m ( α + βt ) [e] t 3 6 m R α 2 + β 2 t 2 4 [1D.] A solid cylinder with moment o± inertia I = 1 2 MR 2 , a hollow cylinder with moment o± inertia I = MR 2 and a solid sphere with moment o± inertia I = 2 5 MR 2 all have a uni±orm density, the same mass and the same radius. They are placed at the top o± an inclined plane and allowed to roll down the inclined plane without slipping. What order do they get to the bottom o± the inclined plane?
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This note was uploaded on 01/08/2012 for the course PHYSICS 205 taught by Professor Galeazzi during the Fall '11 term at University of Miami.

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fall10_f - Dr. Gundersen and Dr. Galeazzi Signature:...

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