Consider the falling body problem where:

m(dv/dt) = W - B - CV. W is weight, B is boyancy and CV is drag force. W,B,C are constants, V is dependant on t of course V(t).

Consider an additional force acting upon the object that depends only on time symbolized by n(t). Assume the body is dropped from rest.

I must set up an IVP for V(t), t > or = 0.

Im a little confused how to approuch this with the extra n(t).

It also doesnt explicity say if n(t) is + or -, but i assume its -, do you agree?

I would assume it to be positive. That's what I usually tend to do in situations like these...
m(dv/dt) = W - B - CV - n(t)

How shall i separate these variables and attempt to solve?

Thanks to all in help.

Chris