So if I strobe this apple while it was falling I would see the separation, when it strobes to increase with time, because the velocity goes up with time.
如果用频闪相机拍摄,苹果下落的过程,可以看到频闪的间隔,苹果的距离,随着时间不断变大,因为速度随着时间而变大。
The falling object, after traveling a certain distance through the air reaches a final speed, or "terminal velocity," because the object's friction with the air slows the fall.
物体在下落一定距离后由于空气阻力都会达到一个终极速度。
Velocity has been falling-which means each dollar the Fed prints has less oomph. POINT: For QE.
对QE的观点:如今周转率正在下降——这意味着联储印出的每一个美元都不太有魅力。
It knows that this particle happened to have a height of 15, at the time of 0, and a velocity of 10, and it is falling under gravity with an acceleration of -10.
这个质点恰好处在高度为15的地方,零时刻,初速为10,并在重力作用下以-10的加速度下坠
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