Exam1_2011_Winter - Physics 140, Winter 2011 First Midterm...

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Physics 140, Winter 2011 First Midterm Exam Physics Department, University of Michigan February 3, 2011 FORM 1 Please print your name: ____________________________________________ Your INSTRUCTOR:_________________________ INSTRUCTIONS AND INFORMATION 1. Fill in YOUR NAME, INSTRUCTOR and the EXAM FORM NUMBER on the scantron. 2. RECORD YOUR ANSWERS ON THE SCANTRON USING A #2 PENCIL. 3. Turn in this exam copy with your scantron answer sheet. 4. This is a 90-minute, closed book exam. You may use one 3” x 5” card on which you have your favorite equations. You also may use a calculator but please do not share calculators. 5. All cell phones and other communication devices must be shut off and out of sight. 6. There are altogether 20 multiple choice questions. All questions are of equal value. Equations/values that you may find useful: s f = s i + v 0 t + ½ a t 2 v f = v 0 + at a rad = v 2 /r F = m a W F ds = % % F k = μ k N g = 9.8 m/s 2
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Physics 140, Winter 2011, Midterm 1 Problem 1: The value of ( 29 i k j × % % % is: A. zero B. +1 C. –1 D. 3 E. 3 Problem 2: Figure shows a 10 kg mass suspended from two spring scales, each of which has negligible weight. Thus, A. Each scale will read 5 kg. B. The top scale will read zero, the lower scale will read 10 kg. C. The lower scale will read zero, the top scale will read 10 kg. D. Each scale will read between 1 kg and 10 kg, such that the two add to 10 kg. E. None of the above. 10kg
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Problem 3: A child standing on a bridge throws a rock straight down. The rock leaves the child’s hand at t = 0. Which of the graphs best represents the velocity of the stone as a function of time? Neglect air resistance. Problem 4: Three boxes with mass m 1 = 1kg, m 2 = 2kg, and m 3 = 3kg are hanging from strings as shown in figure. You are pulling the top string with the force of 100N. What is the tension T 12 in the string connecting boxes m 1 and m 2 ? 0
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Exam1_2011_Winter - Physics 140, Winter 2011 First Midterm...

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