# Lift Force

Written by Jerry Ratzlaff on . Posted in Fluid Dynamics

## Lift Force

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

### Lift Force formula

$$L = \frac {1} {2} C_l \rho v^2 A$$          $$lift \; force \;=\; \frac {1} {2} \; lift \; coefficient \;\;x\;\; density \;\;x\;\; velocity^2 \;\;x\;\; area$$

Where:

$$L$$ = lift force

$$A$$ = area

$$C_l$$ = lift coefficient

$$\rho$$ (Greek symbol rho) = density

$$v$$ = velocity

Solve for:

$$C_L = \frac {2 L} {\rho v^2 A}$$

$$\rho = \frac {2 L} { C_L v^2 A}$$

$$v = \sqrt { \frac {2 L} { C_L \rho A} }$$

$$A = \frac {2 L} { C_L \rho v^2}$$