I have seen how to solve simple ones. My main problem here is isolating t and u. The algebra doesn't work out, and I've been so far unsuccessful in finding a substitution that will separate these variables.
Homework Statement
I am trying to find the parametric equation that describes the following second order differential equation:
Homework Equations
m\frac{d^2y}{dt^2}=-mg - k\frac{dy}{dt}
Where m, g, and k are all constants.
The Attempt at a Solution
I substituted u=\frac{dy}{dt} to reduce...