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NCB<br />
NFA<br />
NFB<br />
ΣFV = 0 ΣFH = 0<br />
VA+NAB = 0 NAF = 0<br />
100+NAB = 0<br />
NAB = -100 KN<br />
Nó “B” Forças Verticais (V) Forças Verticais (H)<br />
50<br />
NBA<br />
ΣFV = 0 ΣFH = 0<br />
-50-NBA-NBF.cos45° = 0 NBC+NBF.sen45° = 0<br />
-50-(-100)-NBF.cos45° = 0 NBC+70,7.sen45° = 0<br />
-NBF = -50÷cos45° NBC = - 50 KN<br />
NBF = 70,7 KN<br />
Nó “C” Forças Verticais (V) Forças Verticais (H)<br />
10<br />
NCF<br />
NFC<br />
Forças Verticais (H)<br />
ΣFV = 0 ΣFH = 0<br />
-100-NCF = 0 -NCB+NCD = 0<br />
NCF = -100 KN -(-50)+NCD = 0<br />
NCD = - 50 KN<br />
Nó “F” Forças Verticais (V)<br />
ΣFV = 0 ΣFH = 0<br />
NFC+NFB.sen45°+NFD.sen45° = 0 -NFB.cos45°+NFD.cos45°-<br />
NFA+NFE = 0<br />
= 0<br />
NBC<br />
50<br />
NBF NBA NBF<br />
NFD<br />
NC<br />
NFE<br />
10<br />
NCF<br />
NFB NFC NFD<br />
NCB<br />
NBC<br />
-100+70,7.sen45°+NFD.sen45° = 0 -70,7.cos45°+70,7.cos45°-0+NFE<br />
NFB<br />
NFA<br />
NBF<br />
NC<br />
NFD<br />
NFE<br />
NFD = 50÷sen45° NFE = 0 KN<br />
4
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