Symbol

Description

$x_i$

horizontal location of particle i

$y_i$

vertical location of particle i

$n^{+}$

number of positively-charged particles

$n^{-}$

number of negatively-charged particles

$i^{+},j^{+}$

indices for positively-charged particles

$i^{-},j^{-}$

indices for negatively-charged particles

$d_{ij}^2$

distance between particles i and j

${\left(F_x\right)}_i^{+}$

net horizontal force exerted on particle i⁺

${\left(F_y\right)}_i^{+}$

net vertical force exerted on particle i⁺

$F_i^{+}$

magnitude of force exerted on particle i⁺

$h_i^{+}$

direction of force exerted on particle i⁺