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Roof 123 A storm blows wind across the top of a roof at a speed of y-26.5 m/s. Assume the air on the lower side of the roof (

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Answer #1

Given
Speed V=26.5m/s
The density of air is ρ= 1.28 Kg/m³
area of the roof is A = 39.3 m2.
The pressure is reduced below rest pressure by dP = ½*ρ*V² (Bernoulli's law)
1) dP = .5*1.28*26.5² = 988.4736 Pa
This will be the pressure trying to lift the roof.

2) Fy = dP*A = 988.4736 *39.3 = 38847N

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