Dorothy is up on her 10.0m by 17.0m roof enjoying the view of Kansas. Suddenly, a strong wind blows down her ladder, leaving her stranded. She knows that a high wind reduces the air pressure on the roof, and that there is a danger that the atmospheric pressure inside the house will blow the roof off. As the wind reaches a speed of 37.5m/s, she calls to her Auntie Em for help. Calculate the force on the roof.
deltaP = rho v^2 / 2
= (1.225 kg / m^3 ) (37.5^2) / 2
= 861.33 Pa
F = P A = (861.33) (10 x 17) = 146425.8 N
Dorothy is up on her 10.0m by 17.0m roof enjoying the view of Kansas. Suddenly, a...