問題詳情
4.如右圖所示，平面上有一粗細均勻之直角彎曲水管，內有水持續流動，A至B的流量為每秒4 kg，流速為5 m／s。則在直角轉彎處，水施於水管之作用力為何？
(A)0
(B) N↗
(C) N↙
(D) N↗
(E)N↙。
參考答案
答案：D
難度：非常困難0
統計：A(1),B(0),C(0),D(0),E(0)
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