速度既是一个抽象的物理概念,又是一个极为重要的物理概念,不能因为学生在小学数学里已经学过而忽视对它的教学。学生能凭感觉判断物体运动的快慢,但不能具体地说明它。笔者利用实验室已有的导轨和惯性小车,自制了滴液瓶,使物体运动的快慢具体、生动地呈现在学生眼前,如图1所示是漏斗形滴液瓶。 Speed ​​is not only an abstract physical concept, but also an extremely important physical concept. It can not ignore the teaching of students because they have already learned in elementary mathematics. Students can judge the speed of the object by feeling, but can not explain it specifically. I use the existing laboratory rails and inertial car, homemade drop bottle, so that the speed of movement of objects specific, vividly presented in front of students, as shown in Figure 1 is a funnel-shaped drop bottle.