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Unformatted text preview: mitchell (jm56986) – HW #2 – montgomery – (24131) 1 This print-out should have 20 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 (part 1 of 2) 10.0 points A physics book is moved once around the perimeter of a table of dimensions 1 m by 3 m. If the book ends up at its initial position, what is the magnitude of its displacement? 1. 4 m 2. 7 m 3. 6 m 4. 5 m 5. 3 m 6. 2 m 7. 0 m correct 8. 8 m 9. 1 m 10. None of these Explanation: Since its final position is the same as its initial position, the displacement is 0. 002 (part 2 of 2) 10.0 points What is the distance traveled? 1. 7 m 2. 5 m 3. 0 m 4. 3 m 5. 2 m 6. 1 m 7. 6 m 8. 8 m correct 9. None of these 10. 4 m Explanation: The distance traveled is the perimeter of the table: d = 2 ℓ + 2 w = 2 (1 m) + 2 (3 m) = 8 m . 003 10.0 points At 1:00 p.m. a car, traveling at a constant velocity of 81 km / h toward the west, is 19 km to the west of our school. How far from the school will it be at 3:30 p.m.? Correct answer: 221 . 5 km. Explanation: In the 2.5 hours of travel time, the car will have traveled Δ d = v t = (81 km / h) (2 . 5 h) = 202 . 5 km , so the new position is d = 19 km + 202 . 5 km = 221 . 5 km west of the school. 004 (part 1 of 2) 10.0 points John runs at 3 . 9 m / s for 5 . 27 s along the x axis. How far does John run?...
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## This note was uploaded on 11/22/2009 for the course PHYS 24131 taught by Professor Montogomery during the Fall '09 term at Northwest MS.

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