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从近几年高考来看,对考生能力的要求逐渐提高,用图象法解决物理问题的能力尤其不容忽视,图象法直观、形象地反映物理规律,让人一目了然,有些情况下使用它能使所研究的问题简易明了,提高解题速度.下面我分别用速度和位移图象解2007年高考全国卷,理综第23题,供大家参考.原题甲乙两运动员在训练交接棒的过程中发现:甲经短距离加速后能保持9 m/s 的速度跑完全程;乙从起跑后到接棒前的运动是
From the college entrance examination in recent years, the requirements for examinees’ ability have gradually increased, and the ability to solve physical problems with the image method cannot be ignored. The image method intuitively and vividly reflects the laws of physics, making it clear to people, and in some cases it can use it. To make the research problem simple and clear, to improve the speed of problem solving. Next, I use the speed and displacement images to solve the 2007 national college entrance examination in the national roll, the composition of the twenty-third problem, for your reference. The original title of the two athletes in the process of handling the exchange bar Found that: After a short-distance acceleration, A can maintain the speed of 9 m/s to complete the course; B’s movement from the start to the next is