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## Homework Statement

In a tornado, the pressure can be 15 percent below normal atmospheric pressure. Suppose that a tornado occurred outside a door that is 195 cm high and 91 cm wide. What net force would be exerted on the door by a sudden 15 percent drop in normal atmospheric pressure? In what direction would the force be exerted?

## Homework Equations

Here lies the problem.

I do no know which formula I should be using.

I know that atmospheric pressure is about 1.0 x 10^5 N/m squared at sea level.

Which I'm inferring is what I would use for the problem.

Could someone post a formula or something?

I think that's all I would need.