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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))`

A

`4.8xx10^(5)N," upwards"`

B

`2.4xx10^(5)N," upwards"`

C

`2.4xx10^(5)N," downwards"`

D

`4.8xx10^(5)N ," downwards"`

Text Solution

Verified by Experts

The correct Answer is:
B
`F_("net")=(DeltaP)xxA`
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