A.$-wL/2$
B.$-wL^2/2$
C.$wL^2/8$
D.$wL/4$
A.$-wL/2$
B.$-wL^2/2$
C.$wL^2/8$
D.$wL/4$
A.18kN·m
B.24kN·m
C.30kN·m
D.36kN·m
A. <img src="https://cg-service.oss-cn-shanghai.aliyuncs.com/20240118/1705563392965943.jpeg">
B. <img src="https://cg-service.oss-cn-shanghai.aliyuncs.com/20240118/1705563392982483.jpeg">
C. <img src="https://cg-service.oss-cn-shanghai.aliyuncs.com/20240118/170556339303245.jpeg">
D. <img src="https://cg-service.oss-cn-shanghai.aliyuncs.com/20240118/1705563393099145.jpeg">
A.减半
B.不变
C.增加一倍
D.增加两倍
A.减半
B.不变
C.增加一倍
D.增加两倍
A.梁长
B.支座反力
C.荷载大小和位置
D.材料强度
A.P
B.0.5P
C.0.5Pa
D.PI
A.增大
B.减小
C.不变
D.无法确定
A.应力分析法
B.力矩平衡法
C.变形协调法
D.截面法