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Unformatted text preview: Chapter 3, Problem 2. A 90N force is applied to the control rod AB as shown. Knowing that the
length of the rod is 225 mm, determine the moment of the force about
point B by resolving the force into horizontal and vertical components. 4 E ,1...
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l Eliapter 3, Problem 7. "M/ymwmwMyﬁwﬂw/MWIM,”gmmmmmmw x, A sign is suspended from two chains AE and BF. Knowing that the
tension in BF is 200 N, determine (a) the moment about A of the force
exerted by the chain at B, (b) the magnitude and sense of the vertical
force applied at C which creates the same moment about A, (c) the
smallest force applied at B which creates the same moment about A. E % O f6}: : 203k) Fx : \—<Lc>s (00 'o X : am 2 C200 DECO?) 60 on; g
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force directed down and to the left along the centerline of AB. Determine
the moment of that force about C. ‘ 88 mm 56 mm {3‘
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: ~G;\lo;.<:oséa‘3 ~ can“; Sm to“ “\‘300’a.\l2,\\ *1? “(KL XVK "elahe. Before a telephone cable is strung, rope BAC is tied to a stake at B and is
passed over a pulley at A. Knowing that portion AC of the rope lies in a
plane parallel to the xy plane and that the magnitude of the tension T in
the rope is 62 lb, determine the moment about 0 of the resultant force exerted on the pulley by the rope.
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7 E , f t ; ; ﬂ Steel framing members AB, BC, and CD are joined at B and C and are
braced using cables EF and EG. Knowing that E is at the midpoint of BC
and that the tension in cable EF is 110 lb, determine (a) the angle I; , “3* between EF and member BC, (b) the projection on BC of the force
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 Fall '07
 MaureenA.McGraw
 mechanics

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