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在沪科版初中《物理》课本第一册“压强”这一章中,“静止液体内部压强跟深度的定量关系”这部分内容的重点是推导出液体内部的压强公式,使学生对液体内部压强的认识由定性深化为定量.这部分内容的难点主要是液体产生的压强与液体的总重无关.即液体对容器底部的压强与固体对水平支持面的压强在决定因素上是有区别的.笔者之所以这么认为是因为:①从学生的思维、想象能力来看,初中学生的想象比较直观.固体因受重力
In the chapter “Pressure” in Volume 1 of the textbook “Physics” of Shanghai Science and Technology Middle School, the “quantitative relationship between internal pressure and depth of still fluids” focuses on deducing the pressure formula inside the liquid, which enables the students to The understanding of pressure is quantified by qualitative deepening. The difficulty in this part is that the pressure generated by the liquid is not related to the total weight of the liquid. That is, the pressure of the liquid on the bottom of the container and the pressure of the solid on the horizontal support surface are different in determining factors. The reason why the author thinks so is because: 1 From the perspective of students’ thinking and imagination, the imagination of junior high school students is more intuitive.