$2.$ A proton is released at rest, $\backslash (\backslash$mathbf$\{2.0\}\backslash$mathbf$\{$~ c m$\}\backslash )$ distance from an infinitely long, uniformly charged straight line. It is observed that at the instant of release, the proton experiences an electric force of $\backslash (\backslash$mathbf$\{1.44\}\backslash$cdot $\backslash$mathbf$\{10\}^\{-18\}\backslash$mathrm$\{$~N$\}\backslash )$ directed away from the line.

Calculate the speed of the proton when it reaches $6\mathrm{.}0$ cm away from the line. $(20$ points$)$