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N53<br />
-2- N34.sen36,87°-0-(-5).sen36,87°+N35.sen36,87° = 0 +N34.cos36,87°-(-<br />
5).cos36,87°+N35.cos36,87° = 0<br />
= 0<br />
”2”<br />
-N34.sen36,87°+N35.sen36,87°-2+3 = 0 +N34.cos36,87°+N35.cos36,87°+4<br />
(-N34+N35).sen36,87° = -1 (+N34+N35).cos36,87° = -4<br />
N34-N35 = 1÷sen36,87° N34+N35 = -4÷cos36,87°<br />
N34-N35 = 1,67 ”1” N34+N35 = -5<br />
Sistema <strong>de</strong> Equações Substituindo na equação<br />
“1” ou “2”<br />
“1” N34-N35 = 1,67 N34+N35 = -5<br />
“2” N34+N35 = -5 -1,67+N35 = -5<br />
2N34 = -3,33 N35 = -5+1,67<br />
N34 = -3,33÷2 N35 = -3,33 t<br />
N34 = -1,67 t<br />
Nó “5” Forças Verticais (V) Forças Verticais (H)<br />
ΣFV = 0 ΣFH = 0<br />
-2-N53.sen36,87°-N57.sen36,87°-N54 = 0 -<br />
N53.cos36,87°+N57.cos36,87° = 0<br />
-2- (-3,33).sen36,87°-(-3,33).sen36,87°-N54 = 0 -(-<br />
3,33).cos36,87°+N57.cos36,87° = 0<br />
= 0<br />
2<br />
N54<br />
N57<br />
+<br />
2<br />
N53 N54 N57<br />
N53<br />
-2+2+2-N54 = 0 2,66+N57.cos36,87°<br />
N57<br />
11
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