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在一年一度的全国初中应用物理竞赛中,竞赛试题皆出自于生产、生活的客观实体,而学生在物理课堂里接触的大多是经过编者处理的理想情景,故学生遇到这类题目总感到“老虎吃天,无从下手”.破解这种难题的杀手锏就是实际问题向理想模型的转化,即建立理想模型.建立物理模型的原则是:抓住事物的本质属性及影响事物的主要因素,忽略其非本质属性和影响事
In the annual national junior high school applied physics competition, the contest questions are all from the objective entity of production and life. Most of the students in the physics classroom are exposed to the ideal situation handled by the editors. Therefore, students always feel that they have encountered such problems. “The tiger can’t start eating.” The key to solving this problem is the transformation of the actual problem into an ideal model, ie, the establishment of an ideal model. The principle of establishing a physical model is to grasp the nature of things and the main factors affecting things, ignoring their non-essential attributes and influence.