Question

The flow speeds of air on the lower and upper surface of the wing of an aeroplane are v and √2v respectively the density of air is ¶ and surface area of wing is a. the dynamic lift on the wing is :​

Answer 1

The dynamic lift on the wing is P2 - P1 = 1/2 ρV^2

Explanation:

Let, P  1  be the pressure for the lower wing and P2  be the pressure of upper wing.

P1 + 1/2 ρV1^2 = P2 + 1/2 ρV2^2

P2 - P1 = 1/2 ρ ( V1^2  - V2^2 ) ------- (1)

V2 = √ 2 V

P2 - P1 = 1/2 ρ ( V^2  - 2V^2 )

P2 - P1 = 1/2 ρV^2

Thus the dynamic lift on the wing is P2 - P1 = 1/2 ρV^2

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