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[主观题]
如图所示,力P作用在BC杆的中点,且垂直于BC杆,若P=kN,杆重不计。则杆AB的内力大小S为: A.1kN B.
如图所示,力P作用在BC杆的中点,且垂直于BC杆,若P=kN,杆重不计。则杆AB的内力大小S为:
A.1kN B.0.5kN C.1.41kN D.2kN
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如图所示,力P作用在BC杆的中点,且垂直于BC杆,若P=kN,杆重不计。则杆AB的内力大小S为:
A.1kN B.0.5kN C.1.41kN D.2kN
A.0.032
B.0.042
C.0.022
D.0.017
A.A.41.lkN
B.B.39.6kN
C.C.40.4kN
D.D.38.7kN
A.M2=M1
B.M2=4M1/3
C.M2=2M1
D.M2=3M1
A.3根杆
B.4根杆
C.5根杆
D.6根杆