that means it changes the velocity.

说明这个力改变了物体的速度
So let's for a moment,

让我们小结一下
in fact for the entire lecture today,

事实上今天的全部课程内容
go back to one dimension.

都回到了一维空间
Then, we will do the whole business in higher dimensions.

之后我们将在多维里进行整体的探讨
In one dimension changing the velocity simply means speeding up.

在一维空间里改变速度意味着提速
So bodies are going to speed up and forces act on them.

因此外力作用于物体物体会加速
That we know.

这是我们清楚的
We're going to find the relation

我们现在要弄清楚
between how much speed is accumulated

当物体受到力的作用时
when a force acts on a body;

速度是如何增加的
We're going to derive that.

我们要把它推导出来