实验一:探究曲线运动速度方向演示仪器材:自纸、小水槽、红墨水、针筒、带有小圆盘的可旋转的电动小机器。演示:将白纸平铺在小水槽中,在白纸适当位置滴上少量红墨水,开动电动小机器,让旋转的小圆盘边沿去击打墨水。若是用免墨水写布代替白纸,用普通水代替红墨水,那样更环保,可用于学生分组实验。见图1、图2。优点:那类旋转海绵探究曲线运动速度方向的方 Experiment one: Explore the curve Movement speed Direction Demonstrator Equipment: Since the paper, small sink, red ink, syringes, rotatable electric small machine with a small disc. Demo: Tile the white paper in the small sink, drop a small amount of red ink in the white paper, turn on the electric small machine, and let the edge of the rotating small disc hit the ink. If you write instead of blank ink instead of white paper, with ordinary water instead of red ink, so more environmentally friendly, can be used for student group experiments. See Figure 1, Figure 2. Advantages: The kind of rotating sponge to explore the direction of the curve velocity side