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(一) 高中一年级物理中“牛顿第二定律”这一课题的教学,是从演示实验出发来研究加速度、力和质量三者之间的关系,求出运动物体的加速度跟作用力成正比,跟物体的质量成反比,从而归纳出牛顿第二定律.但是根据课本进行演示实验,往往发生问题,有时所求得的结果,与所期望的相差颇多,有时在课前准备实验时所求得的结果很满意,但在上课虽然是同样的仪器和配备,由于稍有移动,所测出的数据与准备时就不相同,因而结果不够准确.
(1) The teaching of the subject “Newton's second law” in the first grade of high school physics is to study the relationship between acceleration, force and quality from the demonstration experiment, and to determine the acceleration and force of a moving object. It is proportional to the quality of the object, which leads to Newton's second law. However, according to the textbook, the demonstration experiment often leads to problems. Sometimes the result is different from the expected one. Sometimes the experiment is prepared before class. The results obtained at the time were very satisfactory, but in the same class and equipment as in the class, the measured data was not the same as the preparation due to a slight movement, and the result was not accurate enough.