Final_Exam_S05 - NAME Recitation Instructor: Recitation...

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Unformatted text preview: NAME Recitation Instructor: Recitation Section #: Physics 112 May 12, 2005 Final Exam 12 noon - 2:30 PM PLEASE BE SURE THIS PACKET HAS 15 PAGES! ( This includes the cover sheet and a scrap page.) This packet contains 6 Short Answer Questions, 4 Problems, 2 pages of Possibly Useful Information, and a page of scrap paper near the end. You may also use the backs of pages for scrap. WORK ON SCRAP PAPER WILL NOT BE GRADED. Write your answers ON THESE QUESTION SHEETS in the spaces provided. For Short Answer Questions #1-6, ONLY ANSWERS WILL BE GRADED. For Problems #7-10, where algebra or computations are required, BE SURE YOUR METHOD OF SOLUTION IS CLEAR, and SHOW YOUR WORK in the spaces provided. If you need more space, use the backs of the question sheets and indicate the whereabouts of your work for each question. ANSWERS WITHOUT WORK will NOT receive credit (except for short answer questions). WORK ON SCRAP PAPER WILL NOT BE GRADED. Point values for questions are given below and in each question. BUDGET YOUR TIME. Don't spend too much time on any one question or part of a question. Answer those questions you can do easily first, and then return to the more difficult ones. It is valuable use of your time to READ THE ENTIRE EXAM before starting to work on it. This is a CLOSED BOOK and CLOSED NOTES exam. You may NOT use any other references or personal assistance. You MAY use a NON-GRAPHING calculator. For Grading Only: (Do not write here.) 1 /15 7 /18 2 /10 8 /10 3 /8 9 /10 4-5 /10 10 /12 6 /7 TOTAL /100 NAME 2 I. SHORT ANSWER [50 points] Please write your answers in the spaces provided. 1. [15 points] A solid block hanging from scale #1 is completely immersed under water in a beaker, without touching the bottom or sides of the beaker. Scale #1 reads 6 N, and scale #2 reads 20 N. (a) [3 points] Draw a carefully labeled free-body diagram for the block. For each force, please identify the body providing it . (b) [4 points] Draw a carefully labeled free-body diagram for the beaker + water, showing only external forces on this combination. For each force, please identify the body providing it . (c) [2 points] Identify any and all pairs of 3rd Law interaction partners among the forces in parts (a) and (b). If there are no such pairs, please write NONE. [Problem CONTINUES on next page] # 1 # 2 Water NAME 3 (d) [2 points] Now scale #1 and the block are raised up so the block is hanging completely out of the water. The new reading on scale #1 is 8 N. What is scale #2's new reading ? Answer: (e) [1 point] The block is removed from scale #1 and placed in a dish of negligible (zero) weight. The dish + block float at the top of the water in the beaker. Now what is the reading on scale #2?...
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This test prep was uploaded on 04/21/2008 for the course PHYS 1112 taught by Professor Leclair,a during the Fall '07 term at Cornell University (Engineering School).

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Final_Exam_S05 - NAME Recitation Instructor: Recitation...

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