浮力综合题既是初二物理的重点,又是一大难点,也是中考命题的热点,多数学生可望而不可及,容易产生畏惧心理,在平时的思维训练过程中又不重视题后分析,因此在考试中很容易失分．本文试以一道中考题说明之．例 (北京市中考题)木块A漂浮在容器中的水面上,它的上面放有一石块B,如图1所示,此时木块A排开水的体积为V1．若将石块B 从木块A上取下,放入水中,静止时,木块A和 The buoyancy synthesis problem is not only the focus of the second day physics, but also a major difficulty, and it is also a hot topic of the examination topic. Most students are elusive, prone to fear, and do not pay attention to the analysis of the questions in the usual thinking training process. It is easy to lose points during the exam. This article tries to explain it in a test question. Example (Beijing examination questions) wooden block A floats on the surface of the water in the container, and a stone block B is placed on it. As shown in Fig. 1, the volume of block A in the row of boiling water is V1. If you remove stone B from block A and put it in water, block A and