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。
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。
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