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Phy121f10 Practice Midterm 1

# Phy121f10 Practice Midterm 1 - Physics 121 Midterm 1...

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Physics 121 Midterm 1. October 5, 2010 Exam form 0 This is a closed book exam. Use your own formula sheet, 8½ x 11 inches, double sided, handwritten. You may only use your own calculator; NO SHARING. ANY manipulation of electronic equipment (I-Pod, cell phone, laptop computer, pager, etc.) other than your calculator is strictly prohibited, and will result in a zero on this exam. Answer all problems on the bubble scan sheet. Before you start, enter your name and student ID number on the answer sheet . This is exam form 0. Mark 0 on the first digit of birth day on the bubble scan sheet . (Do not fill in your birth date.) There are twenty questions, each of which carries equal weight. 1. A car traveling with constant speed is at 1 s at x 1 = 10 m and at 5 s at x 2 = 16 m. What is the time when the car is at 13 m ? A. 5.3 s B. 4.2 s C. 3.0 s D. 3.9 s E. 2.8 s 2. In the graph shown the object travels from 2 s to 8 s . The distance travelled is: A. 48 m B. 56 m C. 102 m D. 32 m E. 29 m 3. The position x of an object as a function of time is given as . All units are understood to be S.I. . The initial time = 0. The direction of the positive x-axis is “forward”. The correct statement is: A. The acceleration decreases with time. B. The initial motion is backward. C. The initial velocity is 5 m/s . D. The motion is forward for all times. E. The acceleration is constant and - 14 . 1 0 s m/s 9 3 6 4 8 12

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Physics 121 Midterm 1. October 5, 2010 Exam form 0 4. Note! There are 2 correct statements. Thus you pencil in 2 scantron bubbles. In a demonstration in a science museum two spheres, one made out of Styrofoam with a mass of 0.01 kg, the other a Lead sphere with a mass of 5 kg, are dropped in an evacuated cylinder from the same height. The following statements are correct: A. The Styrofoam sphere arrives at the bottom before the Lead sphere.
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Phy121f10 Practice Midterm 1 - Physics 121 Midterm 1...

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