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Unformatted text preview: Name____________________________________________________ University of Maryland Department of Physics Physics 121 Dr. E. F. Redish Fall 2009 Exam 2 (Makeup) 18. November. 2009 *** Good Luck *** Instructions: Do not open this examination until the proctor tells you to begin. 1. When the proctor tells you to begin, write your full name at the top of every page. This is essential since this exam booklet will be separated for grading. 2. Do your work for each problem on the page for that problem. You might find it convenient to either do your scratch work on the back of the page before starting to write out your answer or to continue your answer on the back. If part of your answer is on the back, be sure to check the box on the bottom of the page so the grader knows to look on the back! 3. On all the problems except the multiple choice questions in problem 1 or where it says not to explain, your answers will be evaluated at least in part on how you got them. More than half the credit of the problem may be given for the explanation. YOU MAY EARN LITTLE OR NO CREDIT FOR YOUR ANSWERS IF YOU DO NOT SHOW HOW YOU GOT THEM. Partial credit will be granted for correct steps shown, even if the final answer is wrong. Explanations dont need to be long, but they need to show what physics you are using and assumptions you are making. 4. Write clearly and logically so we can understand what you are doing and can give you as much partial credit as you deserve. We cannot give credit for what you are thinking only for what you show on your paper. 5. If you try one approach and then decide on another, cross out the one you have decided is wrong. If your paper contains both correct and incorrect approaches the grader will not choose between the two. You will not receive any credit when contradictory statements are present, even if one is correct. 6. All calculations should be done to the appropriate number of significant figures. 7. At the end of the exam, write and sign the honor pledge in the space below (I pledge on my honor that I have not given or received any unauthorized assistance on this exam.): #1: #2: #3: #4: #5: Total NAME___________________________________________ POINTS_______ Physics 121 Dr. E. F. Redish Fall 2009 Exam 2 (M.U.) If you need more space, continue on the back and check here. 1. (20 points) For the following five items, place the letter or letters corresponding to the correct items in the box to the right of the item. If none are correct, put N. (5 pts each) 1.1 The brakes of your bicycle have failed, and you must choose between slamming into either a haystack or a concrete wall. Which of the following statements justifies why hitting a haystack is the wiser choice? or a concrete wall....
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This note was uploaded on 12/28/2011 for the course PHYSICS 121 taught by Professor Shawhan during the Spring '10 term at Maryland.
- Spring '10