Recent content by danomite

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...