3 The force F of the wind blowing against a building is give

3) The force, F, of the wind blowing against a building is given by

F= Cd pV^2 A / 2

where V is the wind speed, the density of the air, A the cross-sectional area of the building, and cd is a constant termed the drag coefficient. Is this equation valid?

Solution

it is valid take the area of projection insted of cross section

F =cd pv2a/2

cd is cofficient of drag