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Unformatted text preview: Version 021/AABBB ict 03 Turner (92510) 1 This print-out should have 3 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. 001 10.0 points Consider three position curves between time points t A and t B . s B s A B A t A t B 3 2 1 t s Choose the correct relationship among quantities v 1 , v 2 , and v 3 . v = v A + v B 2 when a is a constant. 1. v 1 < v 2 < v 3 2. v 1 = v 2 = v 3 correct 3. v 1 > v 2 > v 3 Explanation: The average velocity of an object is v = displacement time = s B- s A t B- t A . All three curves have exactly the same change in position s = s B- s A in exactly the same time interval t = t B- t A , so all three average velocities are equal: v 1 = v 2 = v 3 . 002 10.0 points A boat moves through a river at 7.7 m/s relative to the water, regardless of the boats direction. If the water in the river is flowing at 2.4 m/s, how long does it take the boat to make a round trip consisting of a 209 m displacement...
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This note was uploaded on 10/20/2011 for the course PHYSICS 302K taught by Professor Irenepolycarpou during the Summer '09 term at University of Texas at Austin.
- Summer '09