[SOLVED] langevin equation

[ehrenfest]

1. The problem statement, all variables and given/known data
http://en.wikipedia.org/wiki/Langevin_equation
Can someone explain to me how to reconcile the Langevin equation with Newton's Second Law? They are clearly different and I cannot think of a satisfactory reason why!


2. Relevant equations



3. The attempt at a solution

[jae05]

why are they clearly different? i don't seem to get you. it looks like there's ma on one side, and a sum of forces on the other side. looks perfectly like the 2nd law to me. is it the H(t) term you're worrying about?

[ehrenfest]

Now that I think about, I don't see the point of my question either.