And this means they're subject to air resistance.

这意味着它们会受到空气阻力。

You have a counteracting force, the force of air resistance, I N upward.

现在考虑更多的例子。

This is the force of friction or you can call it air resistance.

现在考虑更多的例子。

If the ball gets too smooth, the air resistance for certain speeds goes up.

如果球过于光滑，它在一定速度下产生的空气阻力会变大。

If you watch those astronauts, they move really quickly because there's no air resistance.

如果你仔细观察那些宇航员，你会发现他们的移动速度非常快，因为没有空气阻力。

24. The leaf, drifting slowly, showcased the effects of air resistance.

24. 叶子缓慢地飘动，展示了空气阻力的影响。

16. Where there is no air resistance, objects fall at the same rate.

16. 在没有空气阻力的地方，物体以相同的速度下落。

Other forces act on moving objects, as well, like friction and air resistance, counteracting gravity, making this acceleration hard to see.

当然也有其他的力作用在移动的物体上，如摩擦力和空气阻力，它们抵消了部分引力，使这种加速度很难被察觉。

This streamlined shape minimizes air resistance, allowing the falcon to reach mind--boggling speeds.

这种流线型的形状最大限度地减少了空气阻力，使猎鹰能够达到令人难以置信的速度。

Well, the reason is air resistance.

嗯，原因是空气阻力。

The voltage must build up sufficiently to overcome the air's resistance, an electrical breakdown voltage.

电压必须足够高以克服空气的阻力，即电击穿电压。

It all comes down to the ratio of weight to air resistance.

这一切都归结 为重量与空气阻力的比率。

30. Though we often forget, air resistance plays a role in everyday motion.

30. 尽管我们经常忘记，空气阻力在日常运动中发挥着重要作用。

The dancer's spin slows down due to air resistance.

6. 由于空气阻力，舞者的旋转速度减慢。

14. Air resistance affects the falling leaf.

14.空气阻力影响落叶。

So, you can consider the air resistance on the rope as entirely due to its motion through still air.

- 因此，您可以将绳索上的空气阻力视为完全由于其在静止空气中的运动而产生。

By the time the ship's going fast enough for air resistance to matter, it'll be high enough that there's practically no air.

等到飞船的速度足够快到空气阻力影响非常大的时候，高度就已经接近真空了。

As you go up the rope, the ratio of total air resistance to weight for everything beneath increases.

当你沿着绳索上升时，总空气阻力与下方所有物体的重量之比会增加。

So, the rope turns more horizontal in order for the tension to balance out that increasing air resistance.

因此，绳子会变得更加水平，以便张力平衡增加的空气阻力。

Each section has the same weight and experiences the same amount of air resistance because it has the same cross-sectional area.

每个部分具有相同的重量并经历相同的空气阻力，因为它具有相同的横截面积。