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NFA<br />
NBA<br />
Nó “F” Forças Verticais (V) Forças Verticais (H)<br />
NFB<br />
4<br />
ΣFV = 0 ΣFH = 0<br />
NFB-4 = 0 -NFA+NFG = 0<br />
NFB = 4 KN -6,9+NFG = 0<br />
NFG = 6,9 KN<br />
Nó “B” Forças Verticais (V) Forças Verticais (H)<br />
NBF<br />
ΣFV = 0 ΣFH = 0<br />
NBC.sen30°-NBA.sen30°-NBF-NBG.sen30° = 0 -<br />
NBA.cos30°+NBC.cos30°+NBG.cos30° = 0<br />
NBC.sen30°-(-8).sen30°-4-NBG.sen30° = 0 -(-<br />
8).cos30°+NBC.cos30°+NBG.cos30° = 0<br />
NBC.sen30°-NBG.sen30°+4-4 = 0<br />
6,9+NBC.cos30°+NBG.cos30° = 0<br />
NBC.sen30°-NBG.sen30° = 0<br />
NBC.cos30°+NBG.cos30° = -6,9<br />
(NBC-NBG).sen30° = 0<br />
(NBC+NBG).cos30° = -6,9<br />
6,9÷cos30°<br />
”2”<br />
NFG<br />
NBC<br />
NB<br />
NFB<br />
4<br />
NBC<br />
NBA NBF NB<br />
NBC-NBG = 0÷sen30° NBC+NBG = -<br />
NBC-NBG = 0 ”1” NBC+NBG = -8<br />
Sistema <strong>de</strong> Equações Substituindo na equação<br />
“1” ou “2”<br />
NFA<br />
NBA<br />
NFG<br />
NBC<br />
NB<br />
26
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