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問:上大下小的容器中,液體的重量大於它對器底的壓力,上小下大的容器中,液體的重量小於它對器底的壓力,这個現象應當如何解釋? 答:這個問題的答案是很容易料想到的。由於整個液體的重量必須都是由容器承担着的,那也就是說,液體加在容器各處的力總加起來必然是一個豎直向下的力,數值等於液重,那麽當液重和液體加於器底的壓力不等時,我們可以料想到,其間的差别一定是由於液體還對於容器壁加有一定的力。以上大下小的容器為例(圖1),液體加於器底的壓力既然小於
Q: In a large container, the weight of the liquid is greater than the pressure on the bottom of the container. In a small container, the weight of the liquid is less than the pressure on the bottom of the container. How should this be interpreted? A: The answer to the question is easy to think of. Since the weight of the entire liquid must all be borne by the container, that is to say that the sum of the liquid added to the container must be a vertical downward force, the value equal to the liquid weight, then when the liquid weight and When the fluid is applied to the bottom of the vessel at different pressures, we can expect that the difference between the two must be due to the fact that the fluid still has some force on the vessel wall. Above and below the small container as an example (Figure 1), since the liquid pressure in the bottom of the device since less than