But how does it change that constant velocity?
但是力是如何改变速度的呢?
So now we're dealing with a scenario where the block has a constant velocity.
假设物块向下具有不变的速度假设物块向下具有不变的速度。
Or you actually could say an object with constant velocity will stay having a constant velocity
具有恒定速度的物体将一直以这一恒定速度运动,直到有一合力作用于这一物体上。
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