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NGF<br />
3º Passo Método dos Nós<br />
1000+VJ = 2000 VF = 4000a÷4a<br />
VJ = 2000-1000 VF = 1000 N<br />
VJ = 1000 N<br />
Nó “A” Forças Verticais (V) Forças Verticais (H)<br />
40<br />
NAF<br />
ΣFV = 0 ΣFH = 0<br />
-400-NAF = 0 NAB = 0<br />
NAF = -400 N<br />
Nó “F” Forças Verticais (V) Forças Verticais (H)<br />
NFA<br />
VF<br />
NAB<br />
NFB<br />
NFG<br />
NFG = 0<br />
848,5.cos45°+NFG = 0<br />
40<br />
NAF<br />
NFA NFB<br />
VF<br />
ΣFV = 0 ΣFH = 0<br />
NFB.sen45°+NFA+VF = 0 NFB.cos45° +<br />
NFB.sen45°+(-400)+1000 = 0 -<br />
NFB = -600÷sen45° NFG = 600 N<br />
NFB = -848,5 N<br />
Nó “G” Forças Verticais (V) Forças Verticais (H)<br />
NG NG<br />
NG<br />
NAB<br />
NFB<br />
NFG<br />
NGF NG<br />
ΣFV = 0 ΣFH = 0<br />
NGB = 0 -NGF+NGH = 0<br />
-600+NGH = 0<br />
30
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