May i request for 2D simulation that have the purpose of showing Wink theoretical predictions from Coulomb's law ( recall and use Coulomb's law in the form F = Q1Q2/4??_or ^2 for the force between two point charges in free space or air), Grin please? I would like all parameters to be changed. I would like F to be calculate. Unit of Q in C, unit of r in m, unit of ?_o in Fm^-1 & unit of F in N. Thank you so much