An airplane wing is designed so that the speed of the air across the top of the wing is 255 m/s when the speed of the air below the wing is 199 m/s. the density of the air is 1.29 kg/m3. what is the lifting force on a wing of area 27.0 m2?

Explanation:

This problem is solved using Bernoulli's equation.

Let be the pressure at a point.

Let be the density fluid at a point.

Let be the velocity of fluid at a point.

Bernoulli's equation states that for all points.

Lets apply the equation of a point just above the wing and to point just below the wing.

Let be the pressure of a point just above the wing.

Let be the pressure of a point just below the wing.

Since the aeroplane wing is flat,the heights of both the points are same.

So,

Force is given by the product of pressure difference and area.

Given that area is .

So,lifting force is

i think its

answer: the answer is a