来自《耶鲁大学开放课程：基础物理 第7集 第7集》
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9.8 meters per second squared.9.8 米每秒平方 -
Acceleration of the Moon,月球的加速度 -
how am I going to find that?我该怎么求呢 -
So, I need an idea我需要一个 -
on how to find the acceleration of the Moon.来计算月球加速度的方法 -
Anybody from this corner of the room, on the top.坐在墙角的几位同学 你们知道吗 -
How do I find the acceleration of the Moon towards the Earth?我怎么计算月球指向地球的加速度呢 -
What will I have to know? Yes?我需要知道些什么 请讲 -
Very good. That's all I wanted from you.很好 这是我希望你们告诉我的 -
We'll fill in the blanks but it's v^2 / R,我们来填这个空格 是 v^2 / R -
and R is this quarter of a million miles,R是 250000 英里 -
and v is the orbital velocity.v 是轨道速度