Question

The weight of an aeroplane flying in the air is balanced by

• A. Vertical component of the thrust created by air currents striking the lower surface of the wings
• B. Force due to reaction of gases ejected by the revolving propeller
• C. Upthrust of the air which will be equal to the weight of the air having the same volume as the plane
• D. Force due to the pressure difference between the upper and lower surfaces of the wings created by different air speeds on the surfaces

Answer 1

The correct option is D

Force due to the pressure difference between the upper and lower surfaces of the wings created by different air speeds on the surfaces

Application of Bernoulli's theorem.