Recent content by someguy23

\frac {dy}{dt} = v \frac {dv}{dt} = \frac {b}{m} (v- \frac {dx}{dt}) + \frac {K}{m}(y - x)

I understand the theory behind RK, but I'm stuck trying to figure out the logic for doing the substitutions and how to set up the equations. I'm trying to follow the example in this http://epublications.bond.edu.au/cgi/viewcontent.cgi?article=1130&context=ejsie The author's example doesn't...

How does one set up the Runge Kutta for \frac {d^2y} {dt} m = b(\frac {dy} {dt} - \frac {dx} {dt}) + k (y-x) ? Set up the substitution variables: a = \frac {d^2y}{dt} v = \frac{dy} {dt} Then what ? Is there a way to get \frac{dx} {dt} out of the equation ? If not, I have to...