# Lift Force

Written by Jerry Ratzlaff on . Posted in Fluid Dynamics

Lift force, abbreviated as L, for an body moving through a fluid (gas or liquid) or air, is the force exerted perpendicular to the direction of travel.

## Formulas that use Lift Force

 $$\large{ L = \frac{1}{2} \; C_l \; \rho \; v^2 \; A }$$ $$\large{ L = \frac{ C_l \; \rho \; v^2 \; A }{ 2 } }$$

### Where:

$$\large{ L }$$ = lift force

$$\large{ A }$$ = area

$$\large{ \rho }$$  (Greek symbol rho) = density

$$\large{ C_l }$$ = lift coefficient

$$\large{ v }$$ = velocity