2008midterm2 - Phys 111 Fall 2008 General Physics: Class...

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Fall 2008 General Physics: Class Exam II 24 October 2008 Name: Total: /50 Instructions There are 7 questions on 5 pages. Show your reasoning and calculations and always justify your answers. Physical constants and useful formulae Moment of inertia: solid disk I = 1 2 mr 2 Moment of inertia: hoop I = mr 2 g = 9 . 81m/s P atmos = 1 . 01 × 10 5 Pa ρ water = 1 . 0 × 10 3 kg/m 3 Question 1 Two phones are situated on a rod which rotates about the end labeled O. The phones are attached rigidly to the rod. The entire arrangement takes 5s to com- plete one revolution. Which of the following (choose one) is true regarding the angular velocities of the two phones. O a) The angular velocities are both zero. b) The angular velocities are equal but are not zero. c) The angular velocity of the inner phone is larger than that of the outer phone. d) The angular velocity of the inner phone is smaller than that of the outer phone. /4
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This note was uploaded on 06/21/2011 for the course MATHEMATIC 135 taught by Professor Phystago during the Spring '11 term at Waterloo.

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2008midterm2 - Phys 111 Fall 2008 General Physics: Class...

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