# Homework Help: Wind/Air Pressure Problem

1. Jan 23, 2008

### JRose

Outside wind blows at 30.2 m/s. Assuming the inside air is stagnant, what is is the pressure difference between the inside and outside environments? Answer in Pa.

I know that pressure is F/A or Rho(g)(h)...but all I have is velocity! Help?

Thank you kindly!

2. Jan 23, 2008

### Shooting Star

(This has got nothing to do with rho*gh.)

The wind hits the wall and transfers momentum to it, resulting in pressure.

What is pressure? Think about the relationship about force and change in momentum. Tell us your ideas first.

3. Jan 23, 2008

### JRose

Pressure-force exerted on an area. But force relies on an acceleration, where here the wind speed is constant.

What principles rely solely on velocity?

4. Jan 23, 2008

### Shooting Star

Do you know what the impulse of a force is? And any thing else related with it?

5. Jan 23, 2008

### JRose

Ooh. Only vaguely. Impulse has to do with energy transferred in a certain amount of time? (If I'm wrong, my apologies. This was months ago.)

6. Jan 23, 2008

### JRose

Sorry, change in force over a period of time?

7. Jan 24, 2008

### Shooting Star

For a constant force, impulse = force*time. It's also equal to somthing else. If you read up just a bit, then the answer will make sense. Pl do that and come back here.