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在初中物理中静流体问题,特别是液体压强和浮力,非常重要,在教材中占有突出的地位,可是,学生对这些内容的理解常有错误.如认为液体压强由重力产生,压强大小跟液体重力不能没有关系.遇到液体对放置在水平面上的非柱形容器中的液体压力问题,也有疑惑.这些知识一直是造成学生学习上的分化点.为此我设计了几个课外实验,通过观察实验说明问题.液体内部压强,一般来说包括两部分,由表面受到外力作用产生的压强,如大气压或活塞传递的压强;由体内各部分受外力产生的压强,如重力或
In the physics of junior high school, the issue of static fluids, especially liquid pressure and buoyancy, is very important. It occupies a prominent position in textbooks. However, students often misunderstand the content. If you think that the liquid pressure is generated by gravity, the pressure and liquid Gravity can’t be irrelevant. There are also questions about the liquid pressure in liquids placed on horizontal surfaces in non-cylindrical containers. This knowledge has always been a source of differentiation in student learning. For this reason I designed several extracurricular experiments. Observe the experiment to illustrate the problem. The internal pressure of the liquid generally includes two parts, the pressure generated by the external force acting on the surface, such as the pressure transmitted by the atmospheric pressure or the piston, and the pressure generated by external forces in various parts of the body, such as gravity or