What is terminal velocity? Discuss the factors on which it depends.

Explanation

Terminal velocity of the body is the maximum constant velocity acquired by the body while falling freely in a viscous medium.
Terminal velocity `(upsilon)` of a body of radius r, density `rho` moving through a viscous medium of viscosity `eta` and density `sigma` is given by
`upsilon = 2/9 (r^2)/(eta) (rho - sigma)g`
Thus, the value of `upsilon` depends upon r,`rho, sigma` and `eta`.