多法并举求解浮力综合题

• 作 者: 王伦宇
• 出 处: 今日中学生
• 发表日期: 2017年14期
• 关键词: 称量法 阿基米德原理 弹簧测力计 平衡方程 受力分析 甲乙丙 示数 知当 定量的 水溢

求解浮力常见方法有原理法、平衡法、称量法……许多中考压轴题需要综合运用上述方法方可获得正解。现结合2016年中考实例剖析如下:一、利用原理法和平衡法求解例1如图1甲所示,物体A的体积为V,放入水中静止时,浸入水中的体积为V_1;现将一体积为V_2的物体B放在物体A上,物体A刚好全部浸没在水中,如图乙所示。则物体B的密度为()。

Common methods for solving buoyancy are the principle method, the balance method, weighing method ... ... many of the test pressure axis need comprehensive use of the above method can be positive solutions. Now combined with the 2016 senior high school entrance examination examples are as follows: First, the use of the principle of law and the equilibrium method to solve Example 1 As shown in Figure 1 A, the volume of the object A is V, into the water at rest, the volume immersed in water V_1; The volume of V_2 object B on the object A, the object A just completely submerged in water, as shown in Figure B. The density of object B is ().