拨开“巧合”迷雾 凸显规律本质

• 作 者: 李正安
• 机 构: 重庆市奉节永安中学,
• 出 处: 中学物理教学参考
• 发表日期: 2010年11期
• 关键词: 物理教师 习题教学 解题过程 物理模型 竖直平面 动摩擦因数 引力常量 动能定理 动量守恒 牛顿第二定律

在长期的物理习题教学中,笔者发现不少学生的解题过程中存在匪夷所思的巧合,正是这些错误的巧合解法,让学生对物理犹如雾里看花,弄得晕头转向.正如有的同学说“原来我这样解都正确,怎么类似的题我这样做就是与答案不合呢?”这发自学生内心的疑问,恐怕是物理教师经常听到的一句话.我们经常说道经典题必须讲深讲透,我认为讲清某些题存在的

In the long-term teaching of physics exercises, I found that many students have unimaginable coincidences in the process of solving problems. It is these wrong coincidence solutions that allow students to confuse physics with confusion and disorientation. As some students say “It turned out that I correct all the way, how similar questions I do is to do with the answer? ” This is from the inner questions of students, I am afraid that physics teachers often hear a sentence .We often say that classical questions must be said Speaking deeply, I think it is necessary to clarify certain questions