# science

Wind blows at the speed of 30m/s across a 175m^2 flat roof if a house.
what is the pressure difference between inside the house and the outside of the house just above the roof? (assume the air pressure inside the house is atmospheric pressure) ​

what is the force on the roof due to pressure difference?

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1. rho = about 1.2 kg/m^3
pressure diff = (1/2) rho v^2 = 0.6 (900) = 640 Newtons/m^3 or Pascals
force = 640 * 175 Newtons

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