Question

Does the force on a charge due to another charge depend on the charges present nearby?

Answer 1

Coulomb's Law states that the force between two charged particle is given by
$F=\frac{q_1{q}_2}{4\pi {\in }_0{r}^2}$,
where
q₁ and q₂ are the charges on the charged particles
r = separation between the charged particles
${\in }_0$= permittivity of free space

According to the Law of Superposition, the electrostatic forces between two charged particles are unaffected due to the presence of other charges.