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新版高中物理教材中实验“研究平抛物体的运动”的主要任务，一是描出平抛物体运动的轨迹，二是求出平抛物体的初速度。教材所述方法（见图１）具有简便、直观的特点。但“先用眼睛粗略地确定……”，然后“在粗略确定的位置附近，用铅笔较准确地确定小球通过的位置”既不便于
The main task of the experimental “study on the motion of the plane-throwing object” in the new high school physics textbooks is to describe the trajectory of the plane-throwing object, and to find the initial velocity of the plane-throwing object. The method described in the textbook (see Figure 1) is simple and intuitive. However, it is not easy to determine “... roughly with your eyes...” and then “accurately determine the position of the ball passing through near the roughly determined position.”