PHY303k_-_Spring_2010_-_HW_2

PHY303k_-_Spring_2010_-_HW_2 - saldana (avs387) Homework 02...

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Unformatted text preview: saldana (avs387) Homework 02 florin (58140) 1 This print-out should have 11 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. 001 10.0 points The position-versus-time graph below de- scribes the motion of three different bodies (labeled 1, 2, 3). 1 2 3 x B x A t A t B x t A B Consider the average velocities of the three bodies. Which of the following statements is correct? 1. v 1 < v 2 < v 3 2. v 1 > v 2 > v 3 3. v 1 > v 2 and v 3 > v 2 4. v 1 = v 2 = v 3 correct Explanation: Average velocity is v = displacement time = x B- x A t B- t A . All three bodies have exactly same displace- ment in exactly same time, so the average velocities are exactly equal: v 1 = v 2 = v 3 . 002 (part 1 of 3) 10.0 points The position of a car coasting down a hill was observed at various times and the results are summarized in the table below. time distance 0 s . 77 m 1 s 3 . 4 m 2 s 11 . 7 m 3 s 20 . 9 m 4 s 48 m 5 s 67 . 2 m Find the average velocity of the car during the first second....
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This note was uploaded on 08/30/2010 for the course PHY 58140 taught by Professor Florin during the Spring '10 term at University of Texas at Austin.

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PHY303k_-_Spring_2010_-_HW_2 - saldana (avs387) Homework 02...

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