$\displaystyle
\int \frac m{mg - kv}~dv = \int ~dt
$
how do i prove that the acceleration undergoes exponential decay???
just integrate both sides and continue. on the left, you can do it by substitution. let $\displaystyle u = mg - kv$
note that $\displaystyle m$, $\displaystyle g$ and $\displaystyle k$ are constants
huh? please state the whole questionhow do i prove that the acceleration undergoes exponential decay???