总之，向下加速,则重量减小。

So you have lost weight when you accelerate downwards.

youdao

而m2向下加速，因此会减少重量。

M2 is being accelerated down, so it must have lost weight.

youdao

之后因为向下加速，重量减少。

You see, it has lost weight, because it accelerated down.

youdao

准确，物体向下加速。

Exactly-- this object is goingdown.

youdao

取得向下加速度,因此。

This holds for acceleration down Fs=m and so I get F of s equals m times g minus a.

youdao

因此若这里改成小于号，物体就会沿斜面向下加速了。

So if I make this "smaller than" sign the object will start accelerating downhill.

youdao

也就说物体二正在向下加速,如果两个力相等,物体不可能向下加速。

That means this object is going to be accelerated down and if this force is the same as this it can never accelerate down.

youdao

问题来了，系统会沿斜面向上加速还是,向下加速，还是保持静止？

The question is now, is it going to be accelerated uphill or accelerated downhill or no acceleration at all?

youdao

他们都以加速度g向下坠落。

They both fall with the acceleration g.

youdao

加速度说道：，我不让你向下了。

The acceleration says, "I don't want you to go down."

youdao

加速度向下，重量减轻。

Being accelerated down, you've lost weight.

youdao

这个张力在不断增大，又因物体，无加速度-，物体受到向下的力影响-，张力必然不断增加？

So this tension goes up and up and therefore, since this object - is not being accelerated — - we're going to get a force down now on this object — this tension must increase, right?

youdao

现在我,还在电梯里,这次是向下的加速度。

Now I am going to put you in the elevator-- here you are and I'm going to accelerate you down.

youdao

因此，水立即加速向下运动，但由于惯性，到照片拍摄时，仍然只有极少量的水改变运动状态。

The water immediately began to accelerate downward but, due to its inertia, moved only a very small amount by the time the photo was taken.

youdao

作为一个结果，这样做，周围的空气加速向下。

And as a result of doing so, the ambient air accelerates downwards.

youdao

作为一个结果，这样做，周围的空气加速向下。

And as a result of doing so, the ambient air accelerates downwards.

youdao