浮力知识是初中物理教材中的难点。它将密度、力的平衡、压强及阿基米德原理等有关知识综合起来,学生常感解题困难,运用整体法处理有关浮力题目往往会起到化难为易并且省时的作用,从而使问题迎刃而解,便于理解与掌握。例1图1示:水槽中装有水,一个装有盐水 Buoyancy knowledge is a difficulty in junior high school physics textbooks. It combines the knowledge of density, force balance, pressure, and Archimedes’s principle. Students often find it difficult to solve problems. Using the holistic approach to deal with buoyancy topics can often make it difficult and time-saving to make things difficult. The problem is easily solved and easy to understand and master. Example 1 Figure 1 shows: the water tank is filled with water and one is filled with salt water