08SuExamIII.doc - EXAM III PHYSICS 1408 Dr Charles W Myles INSTRUCTIONS Please read ALL of these before doing anything else 1 PLEASE put your name on

08SuExamIII.doc - EXAM III PHYSICS 1408 Dr Charles W Myles...

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EXAM III, PHYSICS 1408, July 30, 2008 Dr. Charles W. Myles INSTRUCTIONS: Please read ALL of these before doing anything else!!! 1. PLEASE put your name on every sheet of paper you use & write on one side of the paper only!! 2. PLEASE DO NOT write on the exam sheets, there isn’t room! Yes, this wastes paper, but it makes my grading easier! 3. PLEASE show all work, writing the essential steps in the solutions. Write formulas first, then put in numbers. Partial credit will be LIBERAL , provided that essential work is shown. Organized, logical, easy to follow work will receive more credit than disorganized work. 4. The setup ( PHYSICS ) of a problem will count more heavily than the math of working it out. 5. PLEASE write neatly. Before handing in your solutions, PLEASE : a) number the pages & put them in numerical order, b) put the problem solutions in numerical order, & c) clearly mark your final answers. If I can’t read or find your answer, you can't expect me to give it the credit it deserves. NOTE: I HAVE 35 EXAMS TO GRADE !!! PLEASE HELP ME GRADE THEM EFFICIENTLY BY FOLLOWING THE ABOVE SIMPLE INSTRUCTIONS!!! FAILURE TO FOLLOW THEM MAY RESULT IN A LOWER GRADE !! THANK YOU!! An 8.5’’ x 11’’ piece of paper with anything written on it & a calculator are allowed. NOTE: Number 1, Conceptual Questions IS REQUIRED ! You may work any three (3) of the remaining 4 problems for four (4) problems total . Each problem is equally weighted & worth 25 points, for 100 points on this exam. 1. MANDATORY CONCEPTUAL QUESTIONS!!! Answer briefly . Most answers should be complete, grammatically correct English sentences. Keep formulas to a minimum. Use WORDS ! If you insist on using formulas, DEFINE EVERY symbol you use. ( Note: Answers using just symbols, without explaining what the symbols mean, will receive ZERO credit!) a. State Newton’s Universal Law of Gravitation . b. State ANY ONE of Kepler’s Three Laws (for planetary orbits). c. State the Work-Energy Principle . d. State the Principle of Conservation of Mechanical Energy . Which kinds of forces are required to be present in order for this principle to hold? e. See figure. Two water slides are shaped differently, but they start at the SAME height , h . Paul & Kathleen BOTH start from rest at the same time & at the height h on different slides . (They’re shown at different heights because they’re shown AFTER they’ve started down!) The slides are frictionless. Who is traveling faster at the bottom? What physical principle did you use to answer this? Who gets to the bottom first?
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