苏科版"初中物理九年级上册第十二章第四节教材中安排了"反复弯折铁丝做功"的实验, 意在说明:做功改变物体的内能———将机械能转化为内能.但笔者在教学中发现本实验存在一些不足之处, 并提出了相应的改进建议.%Chapter 12, section 4, the textbook of the ninth grade of junior high school physics in"Sujiao edition"arranges the experiment of"repeatedly bending iron wire to do work" (as shown in figure 1), which is intended to illustrate that doing work changes the internal energy of an object-transforming mechanical energy into internal energy.However, the author found some deficiencies in this experiment in teaching and put forward corresponding improvement suggestions.
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