# Terminal Velocity

Written by Jerry Ratzlaff on . Posted in Classical Mechanics

## Terminal Velocity

Terminal velocity ( $$v_t$$ ) is when an object is falling under the influence of gravity but with no other influences.

### Terminal Velocity formula

$$\large{ v_t = \sqrt { \frac {2mg} {C_d \rho A} } }$$

$$\large{ v_t = \sqrt { \frac {2W} {C_d \rho A} } }$$

Where:

$$\large{ v_t }$$ = terminal velocity (maximum falling speed)

$$\large{ A }$$ = area of the object

$$\large{ C_d }$$ = drag coefficient

$$\large{ g }$$ = gravitational acceleration

$$\large{ m }$$ = mass

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

$$\large{ W }$$ = weight of object