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在解答流体及链条运动的有关题目时,若涉及重心下降或升高,学生往往无法下手,即使能解答,其过程也很繁琐.如果巧妙运用割补法,可使解答过程简捷、直观、明了,能收到事半功倍的效果.在习题教学中,将这一方法传授给学生,能使教学效率提高.下面举例说明.例1 在一个底面积为 S 的平底圆形水池中,水深为 h,密度为ρ,现把一质量为 m 的木块放入水池中,木块浮在水面上,求池底增加的压强.
When answering questions about fluids and chain movements, if the center of gravity falls or rises, students are often unable to get started. Even if they can answer, the process is very tedious. If the clumping method is used skillfully, the answering process can be simple, intuitive, and clear. , Can receive more effective results. In the exercise teaching, this method is taught to the students, can improve the teaching efficiency. Here is an example to illustrate. Example 1 In a flat-bottomed circular pool with a bottom area of S, the water depth is h, With a density of ρ, a block of mass m is put into the pool. The block floats on the surface of the water and the pressure at the bottom is increased.