通过多年的教学发现,当学生刚接触到重力时,关于“重力的方向总是竖直向下的”这一结论对学生来说是一个难点,同时也发现许多教师在这一知识点的教学上也没有很好的办法,往往只是要求学生记住这一结论。这样一来,导致学生在作业中经常出现许多问 Through many years of teaching, it has been found that when students are newly exposed to gravity, the conclusion that “the direction of gravity is always vertical downwards” is a difficult point for students. At the same time, many teachers find teaching at this knowledge point. There is no good way to do this. It is often just asking students to remember this conclusion. As a result, many students often appear in their homework.