# Terminal Velocity

What exactly is terminal velocity? How is it calculated? Read to find all the answers...

Omkar Phatak

Last Updated: Feb 15, 2019

Definition

Terminal velocity is the constant speed attained by an object in free fall, when the drag force exerted by the fluid layers on it, equals the gravitational force pulling it downwards.

Formula

The terminal velocity attained by an object depends on many factors related to the geometry and physical properties of the object and the fluid properties.

Terminal Velocity (V

Terminal Velocity (V

_{T}) = √[(2Mg)/(ρC_{d}A)]Here

- M is mass of the object
- g is the acceleration due to gravity
- ρ is the density of fluid
- A is the projected area of the object, subjected to drag
- C
_{d}is the drag coefficient