浮力是初中物理学习中的一个难点,究其原因,主要有以下几个方面:一是学生头脑中先有的错误观念,干扰了正确概念、规律的建立。不少学生认为漂浮就是象树叶一样漂在水上,从未 Buoyancy is a difficult point in the study of physics in junior middle schools. The main reasons are as follows: First, the mistaken ideas in the students’ minds interfere with the establishment of correct concepts and laws. Many students think that floating is like floating on the water like leaves, never