Posted by **Anonymous** on Tuesday, November 9, 2010 at 6:04pm.

Winds in a certain city can attain sustained speeds of 45 m/s when the jet stream descends during spring. Approximately what force does a roof with an area of 200 m^2 experience due to the Bernoulli effect, assuming air flow is completely laminar? Density of air is 1.14 kg/m^3 with atmospheric pressure 88,900 Pa.

- physics -
**bobpursley**, Tuesday, November 9, 2010 at 6:55pm
It is approximately

(1/2)*(air density)*V^2*(roof area), but depends upon what the pressure inside the house is, and that depends upon which windows or doors are open.

Air density is about 1.2 kg/m^3.

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