A wind with speed 40 m s - 1 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

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A wind with speed 40 m s - 1 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 direction of the force will be : ρ air = 1 . 2 kg m - 3 NEET 2015 (Phase 1)

TestHub · Accepted Answer

By Bernoulli's equation, P + 1 2 ρ v 2 = P 0 + 0 P 0 - P = 1 2 ρ v 2 F = 1 2 ρ v 2 A = 1 2 × 1.2 × 40 2 × 250 = 1 2 × 1.2 × 1600 × 250 = 2.4 × 10 5 N, upwards

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