Exam 3 - Spring 2005

Exam 3 - Spring 2005 - Please sit in seat number _ PH2100...

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Please sit in seat number ___________________ PH2100 Exam III SPRING 2005 INSTRUCTIONS 1. Remove the answer sheet (General Purpose Data Sheet I) from the exam booklet. 2. Using a #2 pencil, write your first and last name neatly in the NAME box. 3. Under the green box labeled "ID NUMBER", write in your MTU student I.D. number (without dashes) and carefully fill in the appropriate circles corresponding to your ID number. Most of you have your Social Security number as your student I.D. number. If your M number is your student I.D. number, please replace the leading M with a zero. Again, do not include dashes. Leave the "SPECIAL CODES" boxes blank. 4. Be sure to fill in the circles completely and avoid stray marks on the form. 5. This a ninety minute exam. 6. Please cover your Score Sheet at all times. 7. This is a closed book exam. You may use the PH2100 Formula Sheet that is attached to this exam, and you may find it convenient to rip the formula sheet from the exam booklet. 8. Equations may not be stored in calculators, nor may calculators be exchanged. 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 on seven following pages: each question is worth five points. Problem 31 is a five-point bonus question. The total number of points available on the exam is 155, out of which 5 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.
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PH2100 Exam III SPRING 2005 1 The following information pertains to the next five questions: A ladybug sits at the outer edge of a merry-go-round of radius 2.5 m, and a gentleman bug sits halfway between her and the axis of rotation. The merry-go-round starts from rest, and accelerates uniformly such that after 30 seconds it rotates at a rate of 2.0 revolutions per minute. 1. At any given instant in time, the gentleman bug's velocity is (A) half the ladybug’s. (B) the same as the ladybug’s. (C) 2 times the ladybug’s. (D) twice the ladybug’s. 2. During the first 30 seconds of motion, the angular acceleration of the ladybug is (A) 8.55×10 -4 rad/s 2 (B) 3.12×10 -3 rad/s 2 (C) 6.98×10 -3 rad/s 2 (D) 1.40×10 -2 rad/s 2 (E) 2.76×10 -2 rad/s 2 3. During the first 30 seconds of motion, the direction of the acceleration of the gentleman bug, according to the diagram at the right is (A) A (B) B (C) C (D) D (E) E 4. While the merry-go-round rotates at a constant angular velocity, which of the following is a correct free body diagram for the ladybug? Take the positive radial direction to be to the left in the side-views below.
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Exam 3 - Spring 2005 - Please sit in seat number _ PH2100...

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