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Exam 1 Problem 1 - EGM 2511 Exam 1 Fall 2009 NANEE(Last...

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Unformatted text preview: EGM 2511 Exam 1 Fall 2009 NANEE (Last, First) Section: 1592 or 1593 or 1594 (circle one) SHOW YOUR WORK - BOX 0R UNDERLINE ANSWERS Problem 1. (33 points total) a) Suppose the 550 1b force below is to be resolved into components in the a—a’ and b-b’ directions. Use trigonometry to find the values of these components Show any necessary diagrams. component in a—a’ = 801 lb component in b—b’= fl 28 lb 550 lb ., b' b) For a particular vector, the direction cosines, cos 9x— — .90 and cos 9y— — .30 Therefore, the direction cosine for Oz , cos 02: 0 ‘3! E and 02: 7/. 2 a . For a 1000 N force in the direction of this vector, What would the X component of the force be? Q 525’ M . 2 4534.305. gpgfizt :1) [email protected]&39. ) cage? @=.3/£2277 .9?» .. 71. 51:5 0 c) The product of a scalar and a vector is a scalar. TRUE / Fw (circle one) d.) The addition of vectors is not commutative. TRUE / @ (circle one) e.) Vector products are not commutative. Em / FALSE (circle one) f.) Vector products have the distributive quality. W FALSE (circle one) g.) As far as its rotation and translation effects are concerned, a force acting on an extended rigid body is best represented as a 1) bound vector, _ 2) free vector 3- sliding vector, 4) negative vector. (circle one) ...
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