A fluid flowing past the surface of a body exerts a force on it. Lift is the component of this force that is perpendicular to the oncoming flow direction.[1] It contrasts with the drag force, which is the component of the surface force parallel to the flow direction. If the fluid is air, the force is called an aerodynamic force. In water, it is called a hydrodynamic force.
Lift is the force generated by propellers and wings to propel aircraft and keep them in the air. Birds, bats, insects, fish, flying reptiles, and even falling plant seeds have usefully exploited lift for millions of years.
Lift Force can be expressed as :-
L = 1/2 * ρ * V^2*A*C_L
where:
L = lift force,
ρ = air density,
v = true airspeed,
A = planform area, and
C_L= the lift coefficient at the desired angle of attack, Mach number, and Reynolds number