E=F/q

q (+)

q (-)

q_1 (+)

q_1 (-)

q_2 (+)

q_2 (-)

q_1 = (8, 0)
q_2 = (-8, 0)
q1 = -3.0000000000000004E-8 (slider from (-50 * 10^(-9)) to (50 * 10^(-9)), step (0.01 * 10^(-9)))
q2 = 3.0E-8 (slider from (-50 * 10^(-9)) to (50 * 10^(-9)), step (0.01 * 10^(-9)))
K: (9 * 10^(9))
q = 0.8 (slider from -5 to 5, step 0.2)
q_{prova} = (0, 4)
r_1 = Vector(q_1, q_{prova})
r_2 = Vector(q_2, q_{prova})
u_1: r_1 / abs(r_1)
u_2: r_2 / abs(r_2)
f_1: (((u_1 * K) * q) * q1 / (abs(r_1))^(2))
f_2: (((u_2 * K) * q) * q2 / (abs(r_2))^(2))
f: f_1 + f_2
A = Translate(q_{prova}, f_1)
F_1 = Vector(q_{prova}, A)
B = Translate(q_{prova}, f_2)
F_2 = Vector(q_{prova}, B)
E_{1} = Translate(q_{prova}, f)
F = Vector(q_{prova}, E_{1})
ee: f / q
G = Translate(q_{prova}, ee)
E = Vector(q_{prova}, G)