p201f01-exam03

p201f01-exam03 - Seat # Physics P201 D. Baxter/R. Heinz...

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Seat # Physics P201 D. Baxter/R. Heinz EXAM #3 November 15, 2001 7:00–9:00 PM INSTRUCTIONS 1. Sit in SEAT # given above. 2. DO NOT OPEN THE EXAM UNTIL YOU ARE TOLD TO DO SO. 3. Print your name (last name first) and blacken in the letters on the answer sheet with a #2 pencil. 4. Print your student number (identification number) and blacken in the numbers on the answer sheet with a #2 pencil. 5. Use the fronts and backs of the question sheets for scratch work. Do not use any other scratch sheets. 6. This is a multiple choice exam. Blacken in the answer to each question on the answer sheet. Fill in one and only one answer to each question. 7. Keep your eyes on your own work. 8. You have two hours to complete the exam. When you finish, please show your picture ID as you turn in your answer sheet. Please leave quietly so others are not disturbed. 9. THERE ARE 24 QUESTIONS. PLEASE ANSWER ALL OF THEM. THERE IS NO PENALTY FOR GUESSING! You may use a calculator and three self-prepared sheets of formulas. You may also consult the appendices in the front and back of the book.
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1. A ventilation fan with a moment of inertia of 0.034 kg-m 2 has a net torque of 0.11 N-m applied to it. What angular acceleration does it experience? a. 5.3 rad/sec 2 b. 4.0 rad/sec 2 c. 3.2 rad/sec 2 d. 1.9 rad/sec 2 e. 0.45 rad/sec 2 2. A merry-go-round has a moment of inertia of 500 kgm 2 and a diameter of 4 meters. It rotates while empty at 1/3 revolution per second. When a parent of mass 125 kg jumps lightly on the rim (without causing any torque) the merry-go- round changes speed. How many revolutions per second does it make after the parent jumps on? a. 5 b. 4 c. 2 d. 1/3 e. 1/6 3. Consider two steel rods, A and B. B has three times the area and twice the length of A. The ratio of the Young’s modulus for A divided by the Young’s modulus for B will be: a. 5.0 b. 3.0 c. 2.0 d. 1.0 e. 0.5
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4. A uniform rod AB is 3 m long and weighs 4 N. It is suspended by strings AC and BD as shown. A block P weighing 24 N is attached at E, 3/4 m from A. The
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p201f01-exam03 - Seat # Physics P201 D. Baxter/R. Heinz...

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