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2048_Fall08_Exam2 - 77777 Instructor(s Mueller/Rinzler PHY...

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77777 77777 Instructor(s): Mueller/Rinzler PHYSICS DEPARTMENT PHY 2048 Exam 2 November 4, 2008 Name (print, last first): Signature: On my honor, I have neither given nor received unauthorized aid on this examination. YOUR TEST NUMBER IS THE 5-DIGIT NUMBER AT THE TOP OF EACH PAGE. (1) Code your test number on your answer sheet (use lines 76–80 on the answer sheet for the 5-digit number) . Code your name on your answer sheet. DARKEN CIRCLES COMPLETELY . Code your UFID number on your answer sheet. (2) Print your name on this sheet and sign it also. (3) Do all scratch work anywhere on this exam that you like. Circle your answers on the test form. At the end of the test, this exam printout is to be turned in. No credit will be given without both answer sheet and printout. (4) Blacken the circle of your intended answer completely, using a #2 pencil or blue or black ink . Do not make any stray marks or some answers may be counted as incorrect. (5) The answers are rounded off. Choose the closest to exact. There is no penalty for guessing. (6) Hand in the answer sheet separately. Where needed use g = 9 . 80 m/s 2
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77777 77777 1. The weight of an object on the moon is one-sixth of its weight on Earth. The ratio of the kinetic energy of a body on Earth moving with speed V to that of the same body moving with speed V on the moon is: (1) 1:1 (2) 6:1 (3) 36:1 (4) 1:6 (5) 1:36 2. An object of mass 1 kg is whirled in a horizontal circle of radius 0.5 m at a constant speed of 2 m/s. The work done on the object during one revolution is: (1) 0 J (2) 1 J (3) 2 J (4) 4 J (5) 16 J 3. Camping equipment weighing 6,000 N is pulled across a frozen lake by means of a horizontal rope. The coefficient of kinetic friction is 0.05. How much work is done by the campers in pulling the equipment 1,000 m if its speed is increasing at the constant rate of 0.20 m/s 2 ?
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