# Atmosphere of earth - why it isnt static?

1. Jan 8, 2010

### player1_1_1

1. The problem statement, all variables and given/known data
here is Earth and here is atmosphere. Why this atmosphere is going around with earth when it is going around, not stay in one place static? i mean not this motion around sun but this motion which is making day and night, the air and everything else is going around with about 1000m/s speed (on equator), how it can be explained?

2. Jan 8, 2010

### turbo

Friction, drag. If the air stayed in place and the Earth was spinning through it at 1000m/s (at the equator), things would be pretty "interesting" to say the least.

3. Jan 8, 2010

### player1_1_1

haha, would be nice wind;]
so it is connected with this "friction" and if this didnt exist on earth all things would stay in one place while earth would spin around?

4. Jan 8, 2010

### turbo

Air is a fluid, and fluids are subject to friction and drag when they move at different speeds than solids with which they are in contact. There are lots of other things that cause the air to be dynamic, too, like differentials in temperature, density, and pressure. That causes our weather, and transports heat and water around our planet.

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