2048_Spring09_FinalExam - 77777 Instructor(s...

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77777 77777 Instructor(s): Hirschfeld/Matcheva PHYSICS DEPARTMENT PHY 2048 Final Exam April 25, 2009 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
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77777 77777 1. Near the surface of the earth, a startled armadillo leaps upward at time t = 0. At time t = 1 s it is a height of 2 m above the ground. What is the speed and the direction of motion of the armadillo at this time ( i.e. , at t = 1 s)? (1) 2.9 m/s downward (2) 2.9 m/s upward (3) 2.0 m/s downward (4) 2.0 m/s upward (5) 4.9 m/s downward 2. In the figure, a car is driven at a constant speed v over a circular hill and then into a circular valley with the same radius by a driver with mass M. If at the top of the hill the normal force on the driver from the car seat is zero, what is the magnitude of the normal force on the driver from the seat when the car passes through the bottom of the valley? (1) 2 Mg
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2048_Spring09_FinalExam - 77777 Instructor(s...

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