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Unformatted text preview: louey (cal2859) – Reflection 1 – florin – (56930) 1 This printout should have 11 questions. Multiplechoice questions may continue on the next column or page – find all choices before answering. 001 (part 1 of 9) 10.0 points What is the difference between a mathe matical vector and a VPython Arrow object? 1. A mathematical vector always has its tail at the origin. An arrow object can have its tail anywhere. 2. The arrow object, when displayed, has a different length but the same direction as the mathematical vector. 3. The arrow object, when displayed, has a different length and a different direction than the mathematical vector. 4. The arrow object, when displayed, has a different direction but the same length as the mathematical vector. 5. A mathematical vector can have its tail located at any point. An arrow object must choose a particular point for the tail in order to display the vector. 002 (part 2 of 9) 10.0 points For a VPython Arrow object, what is the difference between the attributes ’pos’ and ’axis’? 1. pos is the same as the mathematical vec tor to be displayed; axis tells VPython where to locate the tail of the vector. 2. pos is the same as the mathematical vec tor to be displayed; axis is the unit vector with the same direction as the mathematical vector to be displayed. 3. pos is the same as the mathematical vec tor to be displayed; axis tells VPython where to locate the tip of the vector....
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This note was uploaded on 03/20/2012 for the course PHY 303K taught by Professor Turner during the Spring '08 term at University of Texas at Austin.
 Spring '08
 Turner

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