Old P1112 Exam 1.pdf - Section YOUR NAME Section Instructor’s Name Physics 1112 7:30-9:00 p.m PLEASE CHECK THAT THIS PACKAGE HAS 14 PROBLEMS ON 16

Old P1112 Exam 1.pdf - Section YOUR NAME Section...

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Section #: ________ YOUR NAME: ___________________________ Section Instructor’s Name: ___________________________ Physics 1112 Prelim 1 Exam February 21, 2019 7:30-9:00 p.m.  PLEASE CHECK THAT THIS PACKAGE HAS 14 PROBLEMS ON 16 PAGES! A formula and value sheet attached to a blank page to be used as scratch paper has been handed out separately. Write your answers directly on the question sheets in the spaces provided. Multiple-choice problems will be graded based on the answer only; work need not be shown. For the other problems, show enough of your work to indicate how you arrived at your result. Clearly label your work and your answers. For numerical answers, be sure to give the appropriate units. If you need more space for calculations, use the backs of the question sheets and clearly label the whereabouts of your work for each problem. Work on separate scratch paper will not be graded. Advice: Do not spend too much time on any one problem or part of a problem. Solve the problems that you can solve easily first, and then return to the more difficult problems. It’s a good use of your time to read the entire exam before starting. This is a closed book exam. You may use non-graphing calculators.  For grading use only: 1-2. _____________ / 6 9. _____________ / 12 14. _____________ / 20 3. _____________ / 6 10. _____________ / 7 4. _____________ / 6 11. _____________ / 15 5-7. _____________ / 7 12. _____________ / 10 8. _____________ / 6 13. _____________ / 5 Total: _____________ / 100
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Your Name: __________________________________ 1 Multiple Choice. For each of the following multiple choice questions, please write the letter(s) corresponding to the best correct answer(s) in the box provided. 1. [3 points] The speed v of deep-water ocean waves depends on g , the magnitude of acceleration due to gravity, and λ , the wavelength of the waves. Use dimensional analysis (consistency of units) to determine the dependence of v on g and λ . ” means “proportional to”. A . v g λ . B . v g λ . C . 1 2 v g λ . D . v g λ . E . v g λ . 2. [3 points] Consider the vector A and coordinate system shown in the figure to the right. Which of the following is/are correct? Give all that apply. A . | | 0 < A . B . | | 0 > A . C . 0 x A < and 0 y A < . D . 0 x A > and 0 y A > . E . 0 x A < and 0 y A > . F . 0 x A > and 0 y A < . G . None. A x + y +
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Your Name: __________________________________ 2 3. [6 points] Four identical blocks, numbered 1-4, on a horizontal frictionless surface, are pushed against a vertical wall by a horizontal force F exerted on Block 1 (see figure to the right). (a) (3 points) In which 3 rd law interaction pair of block-to-block or block- to-wall contact forces do the forces have the largest magnitude? A . 1 2. B . 2 3. C . 3 4. D . 4 Wall. E . All the same. Now the wall is removed so that the blocks can slide freely across the frictionless surface. (b) (3 points) In which 3 rd law interaction pair of block-to-block contact forces do the forces have the largest magnitude?
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