The weight of an aeroplane flying in air is balanced byA. Up thrust of the air which will be equal to the weight of the air having the same volume as the planeB. Force due to the pressure difference between the upper and lower surfaces of the wings, created by different air speed on the surfaceC. Vertical component of the thrust created by air currents strinking the lower surface of the wingsD. Force due to the reaction of gases ejected by the revolving propeller

The weight of an aeroplane flying in air is balanced byA. Up thrust of

1.	The weight of an aeroplane flying in air is balanced byA. Up thrust of the air which will be equal to the weight of the air having the same volume as the planeB. Force due to the pressure difference between the upper and lower surfaces of the wings, created by different air speed on the surfaceC. Vertical component of the thrust created by air currents strinking the lower surface of the wingsD. Force due to the reaction of gases ejected by the revolving propeller
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