A wind with speed 40 m//s blows parallel...

A wind with speed `40 m//s` blows parallel to the roof of a house. The area of the roof is `250 m^(2)` . Assuming that the pressure inside the house is atmospheric pressure, the force exerted by the wind on the roof and the direction of the force will be : `(rho_(air)=1.2 kg//m^(3))`

`4.8 xx 10^5` N, upwards

`2.4 xx 10^5` N, upwards

`2.4 xx 10^5` N, downwards

`4.8 xx 10^5` N, downwards

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