A.RA=RB=20kN(↑)
B.RA=RB=20kN(↓)
C.RA=10kN(↑)、RB=30kN(↑)
D.RA=10kN(↓)、RB=30kN(↓)
A.RA=RB=20kN(↑)
B.RA=RB=20kN(↓)
C.RA=10kN(↑)、RB=30kN(↑)
D.RA=10kN(↓)、RB=30kN(↓)
A.RA=P/2
B.RA=P
C.RA=2P
D.RA=0
A.10kN
B.20kN
C.25kN
D.30kN
A.<img src="https://cg-service.oss-cn-shanghai.aliyuncs.com/20240111/1704959829318998.png">
B.<img src="https://cg-service.oss-cn-shanghai.aliyuncs.com/20240111/1704959829341277.png">
C.<img src="https://cg-service.oss-cn-shanghai.aliyuncs.com/20240111/1704959829400149.png">
D.<img src="https://cg-service.oss-cn-shanghai.aliyuncs.com/20240111/1704959829417864.png">
A.P
B.P*a/L
C.P/2
D.P*L/a
A.20kN
B.30kN
C.50kN
D.40kN
A.A支座反力为20kN,B支座反力为20kN
B.A支座反力为10kN,B支座反力为30kN
C.A支座反力为30kN,B支座反力为10kN
D.A支座反力为40kN,B支座反力为0kN
A.RA=RB=10kN(↑)
B.RA=RB=10kN(↓)
C.RA=5kN(↑)、RB=15kN (↑)
D.RA=5kN(↓)、RB=15kN(↓)
A.A支座反力增加
B.A支座反力减少
C.B支座反力增加
D.B支座反力减少