In particular,cosine of alpha,I can get, well, we know how to find the angle between two vectors.
特别地，能得到α角的余弦值，我们知道如何找两向量的夹角。
I have here that same ladder, and now what I will do is I will set the angle alpha not exactly at the critical point but a little lower, so that when I let it go, we'll all see that it will slide.
这是一个梯子，现在我要,使得角度α,不是恰等于临界点,而是略小一些，所以当我放手，我们会看到它下滑。
It is fairly easy to measure a friction coefficient by putting an object on an incline and by changing the angle of the incline, increasing it This is the angle alpha.
测量摩擦系数有一种简单方法,把物体放置在斜面上,然后不断增加斜面的倾斜度,这是角α
but remember, we set it at the critical angle, so that cotangent alpha is 2 mu.
,但是记住，摆放的恰是临界角，所以cotα等于2μ
ALPHA VANE, a small moveable airfoil on the side of the fuselage transmitting airplane Angle relative to airstream for the stall warning system.
迎角叶片，位于机身侧的可动小翼面。为失速警告系统传输飞机对气流的相对角度。
ALPHA VANE, a small moveable airfoil on the side of the fuselage transmitting airplane Angle relative to airstream for the stall warning system.
迎角叶片，位于机身侧的可动小翼面。为失速警告系统传输飞机对气流的相对角度。
应用推荐