Terminal Velocity using iterations $-$ A long buoyant solid cylinder of

diameter, $4$ mm $,$ rises in stagnant water at a steady rate due to buoyancy.

aV$\_($t$)=(0\mathrm{.}0785)/(\backslash$sqrt$($C$\_($D$))),$ Initial Guess C$\_($D$)=1\mathrm{.}2,$ Final C$\_($D$)=1\mathrm{.}3,$V$=0\mathrm{.}068($m$)/($s$)0\mathrm{.}0108$L$\_($cyl$)$ C$\_($D$)$ and estimated C$\_($D$)$ is

less than $10\%$