在讲授新编高中物理课本(甲种本或乙种本)反冲运动这节教材时,可方便地借助气球来演示反冲运动和模拟火箭的水平飞行。下面作一介绍。如图1所示,截取一段小楷毛笔杆,使其两头相通,而长度、内径各约为3厘米及3毫米。将一只儿童玩要用的狭长型气球(小号的气球一般充气前有16厘米 When teaching new textbooks for high school physics textbooks (A or B textbooks), it is easy to use balloons to demonstrate recoil movement and horizontal flight of simulated rockets. Here’s an introduction. As shown in Fig. 1, a small bristle penholder is cut so that it has two ends communicating and the length and inner diameter are about 3 cm and 3 mm, respectively. Play a child with a narrow balloon (the small balloon is generally 16cm before inflation