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 bb’ 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
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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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 Fall '08
 Jenkins
 Statics

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