27. The design of an airplane wing causes the speed of the airflow above the wing to be greater than that below it. If both the upper and lower surface areas of the wing are A, the air density is ρ, the flow speed above is v₁, and the flow speed below is v₂ (v₁ ＞ v₂), what is the approximate magnitude of the lift force experienced by the wing?
(A) (1/2)ρA(v₁ - v₂)²
(B) (1/2)ρA(v₁² - v₂²)
(C) ρA(v₁ - v₂)
(D) ρA(v₁² - v₂²)