Terminal Velocity

Terminal Velocity

Terminal velocity is the constant maximum velocity achieved by an object moving through a viscous fluid.

### Formula

$$v_t=\frac{2r^2(\rho_s-\rho_f)g}{9\eta}$$

### Terminologies

- vt → Terminal velocity.

- r → Radius of sphere.

- ρs → Density of sphere.

- ρf → Density of fluid.

- η → Viscosity.

### Conditions / Special Cases

At terminal velocity:

$$F_{net}=0$$

### Usage

- Used in falling sphere experiments.