It is the sum of all fluid dynamic forces on a body normal to the direction of
external flow around the body. Lift is caused by Bernoulli‟s effect which states that air must
flow over a long path in order to cover the same displacement in the same amount of time.
This creates a low pressure area over the long edge of object as a result a low pressure
region is formed over the aerofoil and a high pressure region is formed below the aerofoil,
it is this difference in pressure that creates the object to rise