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思考题 9.1)有人对“在理想流体中压强与面元方位无关”,表示怀疑,他说: “压强与面元方位无关,怎么会流动?一定是沿速度矢量方向的压强大一些,至少是沿加速度矢量的方向的压强大一些。”你看他错在哪里? 02)有人认为压强是有方向的量,他说: “单位面积的上压力这个压强和单位面积的下压力这个压强就不同嘛。压强是有方向的!”你看问题在哪里?
Question 9.1) Someone doubts that “the pressure in the ideal fluid has nothing to do with the orientation of the bins.” He said: “The pressure is not related to the position of the bin, how can it flow? It must be stronger in the direction of the velocity vector, at least The pressure in the direction of the acceleration vector is stronger.” Where do you think he was wrong? 02) Some people think that the pressure is a directional quantity. He said: “The pressure per unit area is different from the pressure per unit area and the pressure per unit area. Well, pressure is directional!” Where do you see the problem?