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Unformatted text preview: Version 069 DGQ07 gilbert (55485) 1 This printout should have 3 questions. Multiplechoice questions may continue on the next column or page find all choices before answering. 001 10.0 points Determine the dot product of vectors a , b when  a  = 5 ,  b  = 3 and the angle between a and b is / 3. 1. a b = 9 2. a b = 8 3. a b = 17 2 4. a b = 7 5. a b = 15 2 correct Explanation: The dot product of vectors a , b is defined in coordinatefree form by a b =  a  b  cos where is the angle between a and b . For the given vectors, therefore, a b = 15 cos 3 = 15 2 . 002 10.0 points The box shown in x y z A B C D is the unit cube having one corner at the origin and the coordinate planes for three of its adjacent faces. Determine the scalar projection of AB onto AC . 1. scalar projection = 1 2 2. scalar projection = 1 2 3. scalar projection = 1 3 4. scalar projection = 2 3 correct 5. scalar projection = 2 6. scalar projection =...
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 Spring '07
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