论文部分内容阅读
几经修改的高中物理教材,始终沿用两只弹簧秤做力的合成实验的方法。这种方法和使用一只弹簧秤做实验相比,存在以下不足: 1.两只弹簧秤的机械性能不可能完全一致,增大了测量结果的系统误差。 2.测量时既要注意结点的位置重合,又要读较难稳定的两只弹簧秤的读数,这不仅增大了实验难度,而且增大了读数的偶然误差。 3.实验分组数低。改用一只弹簧秤做实
After several revisions of high school physics textbooks, the method of using two spring scales as a synthetic experiment has always been used. Compared with using a spring scale, this method has the following deficiencies: 1. The mechanical properties of two spring scales cannot be completely consistent, increasing the systematic error of the measurement results. 2. When measuring, it is necessary to pay attention to the coincidence of the positions of the nodes, and read the readings of the two spring scales that are more difficult to be stabilized. This not only increases the difficulty of the experiment, but also increases the accidental error of the reading. 3. The number of experimental groups is low. Use a spring balance instead