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斜劈和地面间静摩擦力方向的判断历来都是各类物理测试中的重点和难点,特别是高考物理中对这方面的考查更是历久不衰。笔者在多年的教学实践中发现,许多同学在判定“劈地”间的静摩擦力方向等相关问题时,常常感到束手无策、费时费力,最终导致事倍功半,甚至在某些方面长期存在错误认识。为此本文就“劈地”间的相关问题进行全面的归类解析,以期大大提升静摩擦力的教学效果。
The judgment of the direction of the static friction between the slant and the ground has always been the focus and difficulty in various physical tests, especially the examination of this aspect of the college entrance examination physics is even more enduring. In years of teaching practice, the author discovered that many students often feel helpless, time-consuming and laborious when judging the direction of static friction between “cold grounds” and other issues. Eventually this leads to duplication of efforts, and even long-standing misconceptions in some areas. For this reason, this article carries out a comprehensive classification analysis of the relevant issues between the “slow places” in order to greatly enhance the teaching effect of static friction.