Hello everybody, I am having trouble with this question:
Two common models for the resistive force experienced by a projectile in flight due to air resistance are:-
(a) Force proportional to speed so that ;
(b) Force proportional to the square of speed so that .
Investigate the dependence of on , the viscosity of air and , the effective radius of the body. Show that model (b) assumes that is independent of the viscosity of air.
The bit in bold is the part I can't do - I got for the first bit. Thanks very much and any help is appreciated.