在这速度下去,我们很快要破产了。
在这个时候速度是关键。
以这样的速度在这么高的地方移动,他离灾难永远只有半步之遥。
At the speed and height at which he was moving, he was never more than half a second from disaster.
If there were no voltage on the plates, we would expect everything to be over here in some negative value falling.
如果板子上没有速度,这些可能都在这,都是负值下降的。
The fact that when you go in a circle, you accelerate is what we're learning here, coming from the fact that velocity is a vector and its change can be due to change in the magnitude or change in direction.
而当你做圆周运动时你也在加速,这是我们在这里所学到的,原因就在于,速度是一个矢量,其变化可以通过改变模长,或者方向来实现
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