124_s09_fin - Physics 124 2009 Final 4-7 PM, Tuesday May...

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Physics 124 – 2009 Final 4-7 PM, Tuesday May 12, 2009, College Ave Gym Your name sticker with exam code 1. The exam will last 3 hours, from 4 - 7 PM. Use a #2 pencil to make entries on the answer sheet. Enter the following ID information now, before the exam starts. 2. In the section labelled NAME (Last, First, M.I.) enter your last name, then ±ll in the empty circle for a blank, then enter your ±rst name, another blank, and ±nally your middle initial. 3. Under STUDENT # enter your 9-digit RUID Number. 4. Under CODE enter the exam code given above. 5. You do not need to enter the course or section number. 6. During the exam, you may use a calculator and are allowed two 8.5 x 11 inch sheets of paper with whatever you want written on them. 7. The exam consists of 30 multiple choice questions. For each multiple choice question mark only one answer on the answer sheet. There is no deduction of points for an incorrect answer, so even if you cannot work out the answer to a question, you should make an educated guess. 8. At the start of the exam, make sure that your copy contains all 30 questions. Raise your hand if this is not the case, and a proctor will help you. Also raise your hand during the exam if you have a question. 9. A proctor will check your name sticker and your student ID sometime during the exam. Please have them ready. 10. You are not allowed to give help to any other student, ask for help from any- one but a proctor, or change your seat without permission from a proctor. Doing so will result in a zero score for the exam. 11. Hand in this cover sheet along with your answer sheet. 12. Please sign below to indicate that you have read and understood these in- structions. Useful physical constants : Gas constant R = 8.314 J/mol K. Boltzmann con- stant k B = 1.38 × 10 23 J/K. Avogadro’s number N A = R/k B = 6.02 × 10 23 . 0 C = 273 K. Speed of sound in air = 343 m/s. Atmospheric pressure = 10 5 Pa. Gravitational constant G = 6.67 × 10 11 m 3 /s 2 kg. At earth’s surface g = 9.8 m/s 2 . Stefan-Boltzmann constant σ = 5.67 × 10 8 W/m 2 K 4 . Volume of a sphere = 4 πr 3 / 3.
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1. If you put a uniform block at the edge of a table, the center of the block must be over the table for the block not to fall oF. Now you stack two identical blocks at the table edge (see the ±igure). In terms of the length L of each block, what is the maximum overhang possible? a) L/ 2 b) 3 L/ 4 c) L d) 5 L/ 4 e) 3 L/ 2 2. A runner of mass 60 kg runs around the edge of a horizontal turntable mounted on a vertical frictionless axis through its center. The runner’s velocity relative to the earth has magnitude 3 m/s. The turntable is rotating in the opposite direction with an angular velocity of magnitude 0.2 rad/s relative to the earth. The radius of the turntable is 3 m, and its moment of inertia about the axis of rotation is 85 kg · m 2 . ±ind the ²nal angular velocity of the system if the runner comes to rest relative to the turntable. (You can treat the runner as a particle.)
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This note was uploaded on 03/02/2012 for the course PHYSICS 124 taught by Professor Madey during the Spring '08 term at Rutgers.

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124_s09_fin - Physics 124 2009 Final 4-7 PM, Tuesday May...

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