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fall06FinalExam - Physics 1710.003 Fall 2006 Final...

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Physics 1710.003 Fall 2006 Final Examination Name: Student ID #: Scantron Instructions: 1. Write your name clearly in the space provided. 2. Write and bubble in your student i.d. number in the box provided, starting in the first column and leaving the last two columns blank. 3. Bubble in your KEY ID (which is A ) in the box provided in the upper left corner. This test consists of 16 equally weighted multiple-choice questions. Show all of your work on the pages provided. Don’t hand in any extra sheets or other paper. Suggested procedure for solving the problems: 1. Read each problem carefully and make sure you know what is being asked before starting the problem. 2. Draw a figure for the problem. 3. List the parameters given. 4. Write down the equations to be used. 5. Solve for the answer algebraically 6. Substitute numbers into you final equation and circle your answer. WORK THE EASY PROBLEMS FIRST!!
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1. A rifle is aimed horizontally at the center of a large target 60 m away. The initial speed of the bullet is 240 m/s. What is the distance from the center of the target to the point where the bullet strikes the target? Neglect air resistance. a. 48 cm b. 17 cm c. 31 cm d. 69 cm e. 52 cm 2. The only two forces acting on a body have magnitudes of 20 N and 35 N and directions that differ by 80 ° . The resulting acceleration has a magnitude of 20 m/s 2 . What is the mass of the body?
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3. A 0.50-kg mass attached to the end of a string swings in a vertical circle (radius = 2.0 m). When the mass is at the lowest point on the circle, the speed of the mass is 12 m/s. What is the magnitude of the force of the string on the mass at this position? 4. A 1.5-kg block sliding on a rough horizontal surface is attached to one end of a horizontal spring ( k = 200 N/m) which has its other end fixed. If this system is displaced 20 cm horizontally from the equilibrium position and released from rest, the block first reaches the equilibrium position with a speed of 2.0 m/s. What is the coefficient of kinetic friction between the block and the horizontal surface on which it slides?
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