在自由落体运动的教学中,要用“钱毛管”(又叫牛顿管)来演示在没有空气的空间里物体下落的快慢相同。由于管里的金属片和羽毛都很小,下落过程又很快,学生不易看清,很难达到演示的目的。如果用幻灯机配合进行演示,效果就比较理想。 In the teaching of free-fall sports, use the “money capillary” (also called Newtonian tube) to demonstrate that objects fall in the same space without air. Because the metal sheets and feathers in the tube are very small, the falling process is very fast and students are not easy to see. It is difficult to achieve the purpose of demonstration. If you use a slide projector to demonstrate, the effect is ideal.