初中物理虽然没有明确地讲解牛顿第三定律,但书上却提到“物体间力的作用是相互的。就是说,一个物体对另一个物体施力时。同时也受到另一个物体对它的力的作用。”学生对这一句话很难理解,较难从生活实际中找一个例子来证明。若用小皮球(充气不太足)按以下方法进行演示则很能 Although the junior middle school physics did not explicitly explain Newton’s third law, the book mentioned that "the effect of forces between objects is mutual. That is, when one object exerts force on another, it also receives another object on it. The role of force.” Students are difficult to understand this sentence, it is difficult to find an example from the actual life to prove. If you use a small ball (inflated not enough) to demonstrate according to the following method is very good