So now we're going to turn off the lights and I want to show you the motion of the center of mass.
我们要关上灯,我想给你们展示,质量重心的运动。
So I mentioned to you that the motion of the center of mass is very uniform in the absence of external forces, and that I can demonstrate for you again with the air track.
我向你们提到过,重心的运动是稳定的,若不受外力,我可以再次演示,在空气轨上。
And ultraviolet light will interact with that little ball, the center of mass, and when I then make it dark, you will only see the motion of the center of mass.
这紫外线光可以,与小球互动,也就是质量重心,当周围暗下来,能看到质量重心运动。
应用推荐