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exam1ws03

# exam1ws03 - Last name initial P1 P2 P3 P4 P5 P6 P7 P8 Bonus...

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Last name initial Winter 2003 Last Name______________________________ Physics 175 Exam #1 First Name______________________________ ID # ___________________ Points for each question are indicated in parentheses. Show your work for solutions to questions that require calculations. Explain from where you start to solve the problem and show your math flowing from it for full credit. Surround your result in a box and don’t forget to include the units for your result. If you need more space to finish a question, write BPP (Back of the Previous Page) at the end of the space provided and then complete your work on the back of the previous page. For multiple choice questions, circle the letter which you believe to be correct (or best). In all problems, take the gravitational acceleration g = 10 m/s 2 . Problem 1 (5 points) A ball is thrown straight up. What is the difference in the y-component of its acceleration at the halfway point going up and the halfway point going down? a) 0 b) g c) 2g d) -2g Problem 2 (10 points) The position of a particle in a given coordinate system is r (t) = (5 – t 2 ) i + (- 4 + 3t) j

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