1. The problem statement, all variables and given/known data If wind blows at 35m/s over a house, what is the net force on the roof if its area is 240m^2 and is flat? 2. Relevant equations P=F/A and P1 + 1/2pv^2 = constant 3. The attempt at a solution I have no idea on how to find pressure, because if I sub it into P1 + 1/2pv^2 = constant, it wouldn't work because the pressures would turn out the same because the roof is flat.