Separating differential equatons The initial equation:
$$
y''= g-((C*(y')^2)/m)
$$
and I am trying to separate it into two differential equations.
I also have that the aerodynamic force $F=C*(y')^2$.
The initial equation describes falling motion of a skydiver where I am eventually trying to use python integrate function to predict times for falls of differing heights but first I need to separate this into two differential equations.
I don't know what method to use I started by trying to solve implicitly but i struggled to separate the variables and then I tried to use Laplace transformations but I didn't get far with that either. 

so I have ended up doing this which I think is write 
set z=dy/dx
so z=y'
then 
z'=g-((c*z^2)/m)
