This simulation shows the net electric force acting on each of three point charges. The location of each point charge can be changed by dragging, and the values of the charges can be adjusted using the sliders. Click on the icon in the top right corner to reset the simulation.

[list=1][br][*]Under what circumstances is the net force on one of the charges zero?[br][/*][*]What happens if the signs of all three charges are switched?[br][/*][*]What is the sum [math]\vec{F_1}+\vec{F_2}+\vec{F_3}[/math]?[br][/*][*]Verify the calculation in the yellow box.[br][/*][/list]