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液体对容器底部的压力与液体的重力是两个完全不同的概念,但两者之间又存在着密切的 联系,如图1所示,容器底部所受的液体压力F=pS,Sh实际是以容器底面积S为为截面、以液体深度 h为高的液柱的体积,是这部分液柱的重.所以液体对容器底部的压力F等于以容器底面积为截 面、以液体深度为高的圆柱体液体重,在处理液体压力、压强问题时,可将容器内液体割补成圆 柱体形状,使得液体对容器底部的压力等于液柱重. 例1 如图2,甲、乙、丙三个容器的底面积相等.在三个容器中分别注入质量相等的酒精、水
The pressure of the liquid on the bottom of the container and the gravity of the liquid are two completely different concepts, but there is a close relationship between the two. As shown in Figure 1, the pressure of the liquid at the bottom of the container is F = pS, and Sh is actually The volume of the liquid column where the bottom area S of the vessel is the cross section and the liquid depth h is high is the weight of this part of the column. Therefore, the pressure F of the liquid at the bottom of the vessel is equal to the cross section of the bottom of the vessel and the height of the liquid is high. The cylinder liquid weight, in the treatment of liquid pressure, pressure problems, the liquid inside the container can be cut into a cylinder shape, so that the pressure of the liquid on the bottom of the container is equal to the weight of the liquid column. Example 1 As shown in Figure 2, A, B, C three The bottom area of the containers is equal. Equivalent alcohol and water are injected into each of the three containers.