Question

The curved upper surface of an aerofoil of the wing of an airplane or a bird is critical in generating:

a) Lift
b) Drag
c) Thrust
d) Gravity

Answer 1

The curved upper surface of an aerofoil is critical in generating lift due to Bernoulli's principle.

Step-by-step explanation:

The curved upper surface of an aerofoil, whether on the wing of an airplane or a bird, is critical in generating lift. The shape of the aerofoil creates a pressure difference between the upper and lower surfaces, resulting in lift. This is due to Bernoulli's principle, which states that as the speed of a fluid (in this case, air) increases, its pressure decreases.