HW2_sol

HW2_sol - 3.E Determine the moment ofthe 100-lb force about...

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Unformatted text preview: 3.E Determine the moment ofthe 100-lb force about C. lllllllllrrl U sin.e h o riz on tu [ a n4 ve rtica I' \} Ct]m Poncnts I I fii =h x F ' - C - r . =Qt! -til) x (- 86,0 i, tsdd)f z!oo&-H33i- 96,6i-'r J t E . Problem 3.8 l l l l l A tl-j n. -*l I l n ' l v too )b 3.9 and 3.10 It is known that the connecting rod lB exerts on the crank BC a 2.5-ld.l force directed down to the left along the centerline AB' Determine the moment of that force about C. 42 rnnr & = c B 3 a (p,ott4^)j + (o,osg rlj, N =!yF 'c = (o,ct+L: +qos6j ) u (tooj ,luoofi = 100,8 & + 3q,2& = 140,0 4, N = lttl,}ltf'nr )-C the l l Determine 3.19 A 200-N force is applied as shown to the bracket ABC. moment of the force aboutl. 3.19 5=-pooN)hs3f =- lT3,z N n : (ZOc, N)cos 60" = f l0O N- (tzs,z N)t + 0 oo N ),& 3cn= (0,0a n)i f (o,oun) i D4,*= *eu* F i i i & l, 0,06 o,ott 0 l = 7,s t - 6i - 10,314 o -l7J,z 100 tr E^ =(ZT N,n)1-G r *)l'-ftl,J'/ u,nl/e , 3.20 A smalt boat hangs from trvo davits, one of which is shown in the fig,re. The tension in line ABAD is 82 lb. Determine the moment about C of the resultant force R7 ex€rted on the davit at A. f*, = (+s tb) ! - l l l l l- (14 /6)l 6i-zrsj-s4€ IAus , 8o= 2 4rr fn o= ffB tb)j - (zwtt)i - Gq/l) t Hfso' tah=0E ft)i 1. (z+1 4 dr''t g, = Sozo x Rd t! & lti N"=[o7,iy i t' ,-- l+B -22( -2+ l , r.,. ,_^ It. = (T{t /A'fr)4 +(t't4lt+Y}i -(srf /['#U 4 t t l-l--l -l-Problem 3'51 _-l-l--T--, | | | l) 5(X) rnnr i I H 3.51 Two 80-N forces are applied as shoum to the corners B and D of arectangular plate. (a) Determine the moment of the couple formed by the trvo forces by iesolving each force into horizontal and vertical components and adding the moments of the trvo resulting couples....
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HW2_sol - 3.E Determine the moment ofthe 100-lb force about...

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