液体内外部的压力和压强的问题是初中物理的一个重要的知识点。各种各样的容器,装入不同密度、不同质量、不同高度的液体使同学们感到无从下手。下面通过几个例子来帮助同学们解决这类难点。例1三个质量、底面积相同的容器放在桌面上,倒入相同高度的同一种液体,(如图1)三容器的底部的压强和压力谁最大?对桌面的压强和压力谁最大? The problem of pressure and pressure inside and outside the liquid is an important knowledge point for junior high school physics. A variety of containers filled with liquids of different densities, different qualities, and different heights made it impossible for students to start. Here are a few examples to help students solve such difficulties. Example 1 Three containers with the same mass and bottom area are placed on the desktop and poured into the same liquid of the same height (see Figure 1). Who has the largest pressure and pressure at the bottom of the three containers? Who has the greatest pressure and pressure on the desktop?