but I'm sure you guys have some idea of why we are interested in that.

但我确定你们知道我们为什么喜欢它
Does anybody know why so much time is spent on that? Yes?

有谁知道为什么要在这上面花这么多时间吗你说
Pardon me?

再说一遍
Right.

对
The most famous example is

最有名的例子就是
that when things fall near the surface of the Earth,

当物体地球表面附近下落时
they all have the same acceleration,

它们都拥有相同的加速度
and the acceleration that's common is called g,

这个普遍的加速度叫做g
and that's 9.8 m/s^(2).

大小为9.8m/s^(2)
So that's a very typical problem.

这是一个很典型的问题
When you're falling to the surface of the Earth,

当你讨论下落问题时
you are describing a problem of constant acceleration.

你在描述一个加速度恒定的问题