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quiz9 - :VivekSharmaQuizNine INSTRUCTIONS:#.Returnthe...

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UCSD Physics 2A Fall 2008 Instructor : Vivek Sharma Quiz Nine INSTRUCTIONS: Enter your name and code # in the bottom strip of the first page. Return the entire set of exam sheets with your scantron . Use a #2 pencil to fill your scantron. Write your code number and bubble it in under ““EXAM NUMBER””. Bubble in the quiz version (see letter A -- H at bottom of page) in your scantron under ““ EXAM VERSION””. Since Scantron accepts only letter A - D, those with exam versions E - H should enter corresponding letter from A - D in their scantron card. Ask the proctor if you need clarification. The Post - Turkey Stimulus Quiz MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) In a lecture demonstration a student sits in a swivel chair holding a spinning bicycle wheel oriented with its axis vertical. Initially the chair is motionless. Now the student rotates the axis of the spinning wheel by 180°, so that it is again vertical, but now the wheel is spinning in the opposite sense with respect to the room. When this is done the student and chair begin to rotate also. Which of the following is an accurate statement concerning this process? A) Angular momentum, but not angular kinetic energy, is conserved in this process, independent of whether or not friction is present. B) In the final state the chair will be rotating in the same sense as the wheel, but at a much lower frequency. C) Angular velocity is conserved in this process. D) Assuming the swivel bearing of the chair is frictionless, angular kinetic energy is conserved in this process. E) In the final state the chair will be rotating in the opposite sense of the wheel, but at a much higher frequency.
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