Find the terminal speed of hails falling in still air. The hails can be assumed to have radii approximately equal to 0.3 cm, and the density of the hails is 1 gm cm 3 (almost like water). The drag...

Find the terminal speed of hails falling in still air. The hails can be assumed to have radii approximately equal to 0.3 cm, and the density of the hails is 1 gm cm³
(almost like water). The drag force on the falling hails can be modeled as follows:

F = Crv

where F is in N; C = 3.1 × 10−4 kgm⁻¹ s⁻¹
with r (hail radius) in m and the velocity v in ms⁻¹.