What is an aerofoil? Explain.

(N/A) An aerofoil is a specially shaped solid body designed to generate an upward dynamic lift when it moves horizontally through a fluid like air.
The cross-section of an aeroplane wing is shaped like an aerofoil,which influences the streamlines of the air flowing around it.
When the aerofoil moves against the wind,its orientation relative to the flow direction causes the streamlines to crowd together more densely above the wing than below it.
According to Bernoulli's principle,since the streamlines are closer together above the wing,the flow speed on the top surface is higher than the flow speed on the bottom surface.
This difference in flow speed creates a pressure difference (higher pressure below and lower pressure above),which generates an upward force called dynamic lift that helps balance the weight of the aeroplane.