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平抛物体运动两个演示实验(平抛、竖落实验和平抛、水平分解运动实验)的特点是时间短,整个运动过程在不到零点五秒钟内就结束了。因而在演示实验前若不先作提示,多数学生在这么短的时间内无法得到正确的观察结果。那么,如何解决好这一问题呢?笔者认为,实验过程不仅是手与大脑的参与,各个感觉器官的辅助作用也是不可忽视的。如这两个实验(平抛竖落实验和平抛水平分解运动实验)现象的观察主要是靠耳朵听(平抛竖落两小球同时着地,两小球落地声音重叠在一起)和眼睛看(平抛、水平运动的两个小球同时到达某一位置)。在第一个实验中,同时作平抛和竖落的两个小球同时着地只发出一个声音,但由于两小钢球在落地后会在地面上弹跳几下,所以两个小球落地声音就显得杂乱无
The two parabolic plane motion experiments (flat throw, vertical drop experiment, flat throw, horizontal decomposition motion experiment) are characterized by short time, and the entire movement process ends in less than zero seconds. Therefore, most students would not be able to obtain correct observations in such a short time without first prompting them before the demonstration experiment. So, how do we solve this problem? The author believes that the experimental process is not only the participation of the hand and the brain, the auxiliary role of each sensory organ can not be ignored. For example, the observations of the two experiments (the flat throwing experiment and the peaceful throwing horizontal decomposition exercise experiment) mainly depend on the ears (flat throwing two small balls at the same time, the two small balls landing sound overlapping) and the eyes ( The two balls that are thrown horizontally and horizontally reach a certain position at the same time). In the first experiment, the two small balls that were thrown at the same time and dropped off made only one sound at the same time, but because the two small steel balls bouncing on the ground after landing, the two small balls dropped to the ground. It looks cluttered