Exam 2 - Spring 2006

Exam 2 - Spring 2006 - Please sit in seat number: _ PH2100...

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PH2100 Exam 2 Spring 2006 INSTRUCTIONS 1. Remove the blue answer sheet from the exam booklet. 2. In the left-hand column entitled Student Enrollment Sheet, print and code in your I.D. number and name using a #2 pencil. Your MTU student ID number should be filled in without dashes. For most students, the I.D. number is your Social Security number. If your MTU I.D. number is an “M-number”, replace the leading “M” with a zero. All other entries, besides your answers, should be left blank. 3. Please cover your Answer Sheet at all times . Please keep your eyes on your own papers. 4. Be sure to fill in the circles completely and avoid stray marks on the Answer Sheet. 5. This is ninety minute exam. 6. This is a closed book exam. You may use the PH2100 Formula Sheet that is attached at the end of this exam. You may find it convenient to rip the formula sheet from the exam booklet. 7. Graphing calculators are permitted, but equations may not be stored in calculators, nor may calculators be exchanged. 8. Cell phones and other communication devices should be turned off and may not be used during the exam period. 9. Assume all numerical data supplied with the problems have three significant figure accuracy, unless explicitly identified otherwise. 10. This exam consists of a total of 31 questions: each is worth five points. The total number of points available on the exam is 155. Five points can be considered "bonus" points. 11. If you have any questions during the exam, please raise your hand and wait for assistance. 12. Please turn in only your answer sheet. You may keep the exam booklet and formula sheet. Please sit in seat number: ____________
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PH2100 Exam 2 Spring 2006 Page 2
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PH2100 Exam 2 Spring 2006 Page 1 1. A fisherman catches a fish with a new fishing pole. As he reels it in, the fish is suspended on the end of the fishing line, and is moving upward and slowing down. Which free body diagram is correct for the fish? You may ignore air drag. 2. An object cannot remain at rest unless: (A) there are no forces acting on the object at all. (B) there is only one force acting on the object. (C) the net force acting on the object is a nonzero constant vector. (D) the net force acting on the object is zero. (E) air drag cannot be ignored. 3. A champion skier jumps off of a ski jump. The corresponding motion diagram is shown at the right. At the highest point of the motion (circled), we can conclude that: (A) the net force is non-zero and the velocity is non-zero. (B) the net force is non-zero and the velocity is zero. (C) the net force is zero and the velocity is zero. (D) the net force is zero and the velocity is non-zero (E) We cannot conclude anything about the net force and the velocity of the skier from the motion diagram. 4. True or false: An object's acceleration vector always points
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Exam 2 - Spring 2006 - Please sit in seat number: _ PH2100...

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