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历年高考题都是师生进行复习和研究的宝贵资源,若能善于利用,将会收到良好的教学效果,如一题多解、一题多问或一题多变,有助于理解知识、训练思维和培养能力.现以2007年高考江苏卷第19题为例进行一题多问和多解.该题是关于两个相互作用物体在竖直方向的相对运动问题,作为压轴题,其难度很大.如果对题目进行拓展,不仅能训练思维,而且能加深理解牛顿第二定律、运动学公式和能量守恒定律等规律以及隔
The college entrance examination questions over the years are valuable resources for teachers and students to review and study. If they are good at using, they will receive good teaching results. For example, multiple solutions to one question, one question, or one question may help to understand knowledge. Training thinking and training abilities. Now take the 19th topic of the Jiangsu entrance exam in 2007 as an example to ask more questions and more solutions. This question is about the relative movement of two interacting objects in the vertical direction. It is very difficult. If you expand the topics, not only can you train your thinking, but you can also deepen your understanding of Newton’s second law, kinematics formula, and law of conservation of energy, as well as