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Give reason-Moving air provide a lift.

Dear Student

 Moving air exerts pressure on the objects present on the surface of the earth. The imbalance between the pressures exerted by the air and pressure due to gravity cause the objects to move. 

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A wingis shaped and tilted so the air moving over it moves faster than the air moving under it. As air speeds up, its pressure goes down. So the faster-moving air above exerts less pressure on the wing than the slower-moving air below. 
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