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")=1.2kg//m^(3))`

`4.8 xx 10^5N, upwards`

`2.4 xx 10^5 N, upwards`

`2.4 xx 10^5N, downwards`

`4.8 xx 10^5N, downwards`

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