1.

The weight of an aeroplane flying in the air is balanced by  [NCERT 1974]

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. C  
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» E.


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