Dorothy is up on her 16.0m by 14.0m

Question

Dorothy is up on her 16.0m by 14.0m 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 35.0m/s, she calls to her Auntie Em for help. Calculate the force on the roof.

Answer 1

Force F = 1/2ρv²A = 1/2·1.29·10^-3kg/m³·35²m²/s²·16m·14m = 177 N·