对“探究动能与质量关系实验”的商榷

Discussion on the “experiment to explore the relationship between kinetic energy and mass”

探究影响动能大小因素的实验,是大多数初中物理教材的教学内容.本文分析了这些探究实验存在的缺陷.这些缺陷主要表现在运动路线不可控、木块位移不可测、下降相同高度难保证、相同高度下滑得到相同速度的原因难于解释清楚.

T he experiment of exploring the factors w hich affect the value of the kinetic energy is the teaching content in most textbooks of junior high school physics .But there are some defects ,to some extent ,in these exploring experiments ,which is mainly reflected in the facts that the track of the movement can not be controlled ,the displacement of the wood block can not be measured ,it is difficult to descend the same height and explain clearly w hy slipping from the same height results in the same speed .