The weight of an aeroplane flying in air is b | vedclass

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(B) . The upper surface of the wing is more curved than its lower surface; therefore,the speed of air above the wings is larger than the speed of the

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Force due to the pressure difference between the upper and lower surfaces of the wings,created by different air speeds on the surface

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(B) . The upper surface of the wing is more curved than its lower surface; therefore,the speed of air above the wings is larger than the speed of the air below the wings.According to Bernoulli's theorem,the pressure above the wings becomes less than the pressure below the wings.Due to this difference of pressure on the two sides of the wings,a vertical lift acts on the aeroplane.When this lift is sufficient to overcome the gravitational pull on the aeroplane,the aeroplane is lifted up and sustained in flight.

The weight of an aeroplane flying in air is balanced by

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