Why doesn't the Earth's rotation cause air to crash with us?

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SUMMARY

The Earth's rotation at the equator exceeds 1000 mph, yet we do not experience the atmosphere "crashing" into us due to two primary factors: friction and gravity. The atmosphere rotates in tandem with the Earth, a phenomenon attributed to conservation of angular momentum. While variations in air movement contribute to weather patterns, the concept of 'still air' indicates that it moves at the same velocity as the Earth's surface, preventing any sensation of collision.

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Sakha
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Hello.
We all know that at the equator the Earth's rotates at over 1000 mph.
My question is why don't we feel the air of the atmosphere "crashing" with us.
What holds the air so that it keeps moving with us?
 
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Two ways to look at it:

1. Friction. If the wind were blowing at 1000 mph, there'd be a lot of drag slowing it down.
2. What would cause the air to start to move that fast?
 
Gravity. Conservation of angular momentum. Etc..
The atmosphere has been rotating with the planet since it formed. There are variations, of course, which result in weather, but 'still air' is moving at the same speed as the planetary surface.
 

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