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1987年高考物理题的第五大题是一道力学综合题。由于它概括了运动学、动量守恒定律、机械能守恒定律这几个力学中的重要内容,涉及面广,综合性强,既考查了学生对这几个内容的掌握情况,又考查了学生分析、解决问题的能力,因此中学老师认为此题出得好。笔者在阅卷中,发现有相当一部份学生在解题中存在这样或那样的错误。下
The fifth topic of the physics test of the college entrance examination in 1987 was a comprehensive problem of mechanics. Because it summarizes the important contents of kinematics, the law of conservation of momentum, and the conservation law of mechanical energy, it covers a wide range of fields and has a strong comprehensiveness. It not only examines students’ mastery of these contents, but also examines student analysis. The ability to solve problems, so the middle school teacher thinks this question is good. In the essay, the author found that a certain number of students had this or that error in solving problems. under