So, actually I want you to go ahead in your notes and circle that zero point and write "not a node."
在你们笔记上把这个零点圈出来,在旁边写上“不是节点“,它不是节点“
A circle, in other words, is not necessarily a vicious circle.
循环并不一定是恶性循环。
Suppose the particle is not moving in a circle, but does this.
假设这个质点不是做圆周运动,而是这样
That's not true. A circle isn't at all necessarily vicious.
循环不必然是恶性的。
Okay. For those who have not seen a radian, it's just another way to measure angle with the understanding that a full circle, which we used to think is 360 degrees, So a radian is roughly 60 degrees.
我想告诉那些还不懂弧度制的同学,这是衡量角度的另一种方法,理解起来是这样的,对于一个整圆,也就是我们之前所说的360°,所以1弧度大约是60°
应用推荐