Beer, Johnston, Eisenberg Vector Mechanics for Engineers – Statics 8 ed Ch6.1-7_2007

# Vector Mechanics for Engineers: Statics w/CD-ROM

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\$o..\, ^,. *l- Ta; ^* E a - \ ot \ r 3K\t \ I tr:. E€ -jY o,q,.. 3KN I \ Dg.' q___\ D E LAr^ 3rx) O.9 rn l. Zryr Lf,vrn Ta--J B I G K \$ Fg '[, +__t\Yu lBs -T6.--+ > .5fL,. ba-- tKo (c) Bs= 5K\$ (r) 2F:o= ary, = - BD t ND rgl\ : l r 5 , / ND = ISKIOCT) { F ^ = 6 = - A B t b F C o s S hB: BE (*) hr3='f KrJ (r) - U + B D - B r I5D = l su (.) €FX =o (++) PROBLEM 6.7 using the method of joints, determine the force in each member of the *ln truss shown. state whether each member is in tension or compression. c-b - DE- - Ab G*)

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Be t/z 1ffi , \ S = D l : h c t E P To,.. \ F n \ F \ u*,/l V5oo tb Ei^f 5 T-oi^* B N roou"ft l--l r.r+6+ l] *t" f z,qs 5do 1f,? -DL = EF = 1,rU 1,tu B D 6.r I De q 5(l 2 , 4 1 . , ( , Eu ara \bq_ (. ) t"? 1 lb+ (f) r\. =o B D t tat -F ?1p,1+ BF(+) uu €1) B6(+) - AB(# ) =o esnffi')=F - f)O,:t- =t PROBLEM 6.21 The portion of truss shown represents the upper part of a power transmission line tower. For the given loading, determine the force in each of the members locatedabove member ILI. State whether each member is in tension or compression. Nts= bF = q sq lttT) A c; E F : ?s-t{ lt (c)
Q,81 ar^Jr tO\ =o +* r\\$=o W (tsu) I B' z 25r. tV (c) rh=0 *#{0".i -c€=o €%=u eF{- Hr6sr)-zs6 c-H e 5oo (c ) B c - & c = Sti a*- 4- r g c ;j*sg

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