The surface area of wings is increased in bird by the help of

Wings of insects and birds are

Wings of insects and birds are

The wings of bat and bird are

In a test experiement on a model aeroplane in a wind tunnel, the flow speeds on the lower and upper surfaces of the wing are upsilon and upsilonsqrt(2) respectively. If the density of air is rho and the surface area of the wings is A, what is the dynamic lift on the wing of aeroplane.

Wings of insects and wings of birds are the example of :

Wings of an insect & a bird are example of

An aircraft is moving on a runway for its take off. The wind speed on the lower and upper surface of the wings are 'v' and 'sqrt2'v . If the density of air is rho and surface area of the wing is A, the upward force exerted on thei wings will be