Electrostatic force via charges and distance ============================================ The *Coulomb's law* states that the electrostatic force between two point charges in a vacuum is proportional to their values and inversely proportional to the square of the distance between them. **Notation:** #. :math:`\varepsilon_0` (:code:`epsilon_0`) is :attr:`~symplyphysics.quantities.vacuum_permittivity`. **Notes:** #. Per this law, positive force indicated that the two charges repel (both charges are of the same sign), and negative force indicates that they attract one another (the charges are oppositely charged). **Links:** #. `Wikipedia `__. .. TODO Flip sign of RHS, force should be positive for attraction. .. py:currentmodule:: symplyphysics.electromagnetism.electrostatics.point_charge.electrostatic_force_via_charges_and_distance .. py:data:: electrostatic_force Electrostatic :attr:`~symplyphysics.symbols.classical_mechanics.force` between two charges. Symbol: :code:`F` Latex: :math:`F` Dimension: :code:`force` .. py:data:: first_charge First :attr:`~symplyphysics.symbols.electrodynamics.charge`. Symbol: :code:`q_1` Latex: :math:`q_{1}` Dimension: :code:`charge` .. py:data:: second_charge Second :attr:`~symplyphysics.symbols.electrodynamics.charge`. Symbol: :code:`q_2` Latex: :math:`q_{2}` Dimension: :code:`charge` .. py:data:: distance :attr:`~symplyphysics.symbols.classical_mechanics.euclidean_distance` between the charges. Symbol: :code:`d` Latex: :math:`d` Dimension: :code:`length` .. py:data:: law :code:`F = q_1 * q_2 / d^2 / (4 * pi * epsilon_0)` Latex: .. math:: F = \frac{1}{4 \pi \varepsilon_0} \frac{q_{1} q_{2}}{d^{2}}