2048_Spring08_FinalExam - 77777 Instructor(s):...

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77777 77777 Instructor(s): Field/Hirschfeld PHYSICS DEPARTMENT PHY 2048 Final Exam April 26, 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 1. An elevator is moving upward with constant acceleration. The dashed curve shows the position y of the ceiling of the elevator as a function of the time t. At the instant indicated by the intersection of the solid lines, a bolt breaks loose and drops from the ceiling. Which curve best represents the position of the bolt as a function of time? t y (1) B (2) A (3) C (4) D (5) E 2. Three vectors are arranged to form the right triangle as shown in the diagram (they are also shown separated from the triangle to make clear their directions). The vector ~ V 3 is equal to: (1) ~ V 2 - ~ V 1 (2) ~ V 1 - ~ V 2 (3) ~ V 1 + ~ V 2 (4) ~ V 1 cos θ (5) ~ V 1 cos θ 3. A man rides a Ferris wheel with a radius of 8.0m that makes 1 revolution every 20 s. When he is at the top, one diameter above the ground, he releases a ball. How far from the point on the ground directly under the release point does the
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2048_Spring08_FinalExam - 77777 Instructor(s):...

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