And in your second assignment, which you haven't seen yet I'm asking you to calculate the gravitational acceleration for me using these both experiments.

在各位还没看到的，第二次作业中，我会要求各位，凭借这两个实验的结果，来算出重力加速度。

youdao

and gravity gives you an acceleration of 9.8 meters per second squared.

因为地球的重力,提供了9。8米/秒2的加速度。

youdao

And if you calculate, if you assume that - the acceleration is constant — it's an easy calculation — it turns out that the acceleration is only two meters per second squared.

如果计算一下，如果你假设，加速度恒定-，那就很好推测了，你会发现，加速度仅仅是，2米每秒的平方。

youdao

The first one is velocity, the second one is acceleration.

一阶导数叫速度,二阶导数叫加速度

耶鲁公开课 - 基础物理课程节选

Acceleration is measured in meters per second squared.

加速度的单位是米每秒平方

耶鲁公开课 - 基础物理课程节选

Once you can take one derivative, you can take any number of derivatives and the derivative of the velocity is called the acceleration, and we write it as the second derivative of position.

只要你能求一阶导数,你就能求任意阶的导数,速度的导数被称为"加速度",我们把它写成位移的二阶导数

耶鲁公开课 - 基础物理课程节选

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