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人教版八年级下册第十章《浮力》是中学物理教学中的难点.它涉及到的知识面较广(如:液体压强、液体密度等),应用性较强,题型变化较多.再者由于学生对生活的一些物理现象不能正确理解,导致对浮力产生错误的认识.如:认为沉在水底的物体不受浮力,浸没在液体中的物体越往下沉受到的浮力越大.针对以上的问题,笔者从日常生活中的一些现象着手分析物体在液体中所处的状态;再结合实验对浮力的计算方法加以总结;最后通过练习对浮力加以巩固消化.
People’s Education Press eighth grade eighth chapter tenth chapter “buoyancy” is a middle school physics teaching difficult.It involves a wide range of knowledge (such as: liquid pressure, liquid density, etc.), strong applicability, more changes in the type Furthermore, because students can not correctly understand some physical phenomena of life, they lead to wrong understanding of buoyancy, such as: the object that sinks in the water is not buoyant, and the buoyancy that the object immersed in the liquid sinks is greater In view of the above problems, the author starts from analyzing some phenomena in daily life to analyze the state of the object in the liquid, then summarizes the calculation method of the buoyancy in combination with the experiment, and finally consolidates and digests the buoyancy by practice.