Four charge particle Coulomb's Law Simulation:[br][br]The forces on small charges (in µC) due to a large field producing charge (in µC) can be generated at different positions and charge size.[br]All the charges are user movable. Sliders control size of charges and determine if interactions between small charges is included. [br]“MultipleInteractions” slider turns on interactions between all non-zero charges. “Scale” slider can be used if force vectors are too large.[br][br]James Vesenka, University of New England, 2015

Quantitative data on the size of the forces can be extracted from the algebra panel.[br]Users can plot force versus Q (constant q, r), q (constant Q, r) or r (constant q, Q) and extract a slope related to the constant and k = 9.0x10⁹Nm²/C²