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47.有一下射式閘門位於一寬 5m 的水平矩形渠道內,若已知閘門上游水深為 4.0m,其下游水深及流速分別為 1.0m 及 8.0m/s。假設底床摩擦力可忽略,試問閘門所受到的水平力之大小及方向為何?
問題詳情
47.有一下射式閘門位於一寬 5m 的水平矩形渠道內,若已知閘門上游水深為 4.0m,其下游水深及流速分別為 1.0m 及 8.0m/s。假設底床摩擦力可忽略,試問閘門所受到的水平力之大小及方向為何?
(A) 128kN,向下游
(B) 173kN,向上游
(C)173kN,向下游
(D)140kN,向下游
參考答案
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