問題詳情

48. A steam of water of density  ρ， cross-sectional area A, and speed υ strikes a wall that is perpendicular to the direction of thestream, as shown in the figure below. The water then flows sideways across the wall. The force exerted by the stream on thewall is ______.
(A)


(B)


(C)


(D)


(E)

參考答案

答案：A
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)