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ΣMD =0, -FA.6m -4KN.3m -10KN.m =0
FA = -11/3 KNï¼åä¸ï¼
ΣMA =0, FDy.6m -4KN.3m -10KN.m =0
FDy = 11/3 KNï¼åä¸ï¼
ΣFx =0, 4KN +FDx = 0
FDx = -4KNï¼åå·¦ï¼
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Ncd =|FDy| =11/3 KNï¼ååï¼
Nab =|FA| = 11/3 KNï¼æåï¼
Nbc =|FAx| = 4 KNï¼ååï¼
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