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沪科版八年级物理课本第102页讲“力的作用是相互的”有这么一段文字:“请同学们用手拍桌子、两手互拍、拉橡皮筋、提书包……体会一下施力与受力的感觉。再研究图6-2,你认为力的作用有什么特点?”然后说“大量的事实说明:甲物体对乙物体施力时,乙物体对甲物体也施力,因此,力的作用是相互的。”在教学过程中发现学生很难理解这些话,因此,翻阅了一些参考书,想通过增加演示实验来帮助学生理解。一些参考书在这一节安排这样的实验说明“力的作用是相互的”。
Shanghai Science and Technology eighth grade physics textbook on page 102 to say “the role of force is mutual ” There is such a passage: “Please classmates hands pounding table, hands each beat, pull the rubber band, mention bag ... experience Force and feeling of force .Re-study of Figure 6-2, what do you think the role of force? ”Then say “ A large number of facts show that: A object on the B object when the force, B object on a object Therefore, the power of the force is mutual. ”In the process of teaching, students find it hard to understand these words, therefore, read some reference books, want to help students understand by adding demonstration experiments. Some references in this section arrange such an experiment that “the effect of force is mutual.”