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The basic idea

 

When air flows over a wing, there are changes in air velocity and pressure. These changes determine the aerodynamic force on the wing . Lift is a component of this force and is defined as the force that is perpendicular to the air flow.

Lift is the force that holds aeroplans up in the air. When air flows over a wing that is vertically positioned on a boat, the same lift force drives the boat forward.

 

Wing sail Aircraft wing

 

 

 

 

 



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