力的概念是中学物理中最基本,最重要的概念之一。学生在初二物理课上正式开始学习力的概念由此得到的印象极为深刻,将指导和影响他们整个中学阶段的学习和分析问题。因此,在初中阶段使学生有一个正确观点,打下一个良好基础是十分重要的。在初二教材中,力的概念是从生活实际中引出的。人劳动的时候,肌肉会紧张,引出人对物有作用力。接着讲到相接触的物之间有作用力以及不相接触的物之间也能有作用力。还例举了“磁铁吸引铁钉”“带电棒吸引小纸片”的两个例子。有的教师在讲 The concept of force is one of the most basic and important concepts in middle school physics. The concept that students formally started learning in the 2nd physics class is very impressive and will guide and influence their learning and analysis issues throughout their middle school years. Therefore, it is very important for students to have a correct viewpoint in junior high school and lay a good foundation. In the second grade textbooks, the concept of force is derived from the reality of life. When people work, the muscles will be tense, leading people to exert influence on things. Then it is said that there is force between the contacted objects and the non-contacting objects. Also cited are two examples of “magnet attracting nails” and “burning sticks to attract small pieces of paper.” Some teachers are talking