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NCB<br />
NG<br />
NGF<br />
= 0<br />
“1” NBC-NBG = 0 NBC-NBG = 0<br />
“2” NBC+NBG= -8 -4 - NBG = 0<br />
2NBC = -8 NBG = -4 KN<br />
NBC = -8÷2<br />
NBC = -4 KN<br />
Nó “C” Forças Verticais (V) Forças Verticais (H)<br />
ΣFV = 0 ΣFH = 0<br />
-NCB.sen30°-NCD.sen30°-NCG = 0 -<br />
NCB.cos30°+NCD.cos30° = 0<br />
0<br />
3,5÷cos30°<br />
-(-4).sen30°-(-4).sen30°-NCG = 0 -(-4).cos30°+NCD.cos30° =<br />
2 + 2- NCG = 0 3,5+NCD.cos30°<br />
NCG = 4 KN NCD = -<br />
NCD = -4 KN<br />
Nó “G” Forças Verticais (V) Forças Verticais (H)<br />
NGF+NGH = 0<br />
6,9+NGH = 0<br />
6,9+NGH = 0<br />
KN<br />
NC<br />
NG<br />
NC<br />
NG<br />
NG<br />
+<br />
NCB NC NC<br />
NG NG NG<br />
ΣFV = 0 ΣFH = 0<br />
NGB.sen30°+NGC+NGD.sen30° = 0 -NGB.cos30°+NGD.cos30°-<br />
-4.sen30°+4+NGD.sen30° = 0 -(-4).cos30°+(-4).cos30°-<br />
NCB<br />
NGD = -2÷sen30 +3,5-3,5-<br />
NG<br />
NGF<br />
NGD = -4 KN NGH = 6,9<br />
NC<br />
NG<br />
NG<br />
27