Question
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?
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?
Answers
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
pressure diff = (1/2) rho v^2 = 0.6 (900) = 640 Newtons/m^3 or Pascals
force = 640 * 175 Newtons
Not bad
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