Question

The figure below shows the cross section of an aeroplane wing (aerofoil), with the aeroplane moving in the direction shown by the arrow.

1. Sketch streamlines to show how air flow fast the with as the aeroplane moves
2. Explain how dynamic lift of the aeroplane is caused by the wing. 

Answer 1

1.  
   
2. The above awing moves faster than the air below. Pressure above wing is reduced. The resulting pressure difference creates a lift.