Write the formulas for calculating Coulombic forces and gravitational forces.

(N/A) The formula for Coulombic force is $F_c = \frac{k q_1 q_2}{r^2}$,where $k$ is Coulomb's constant,$q_1$ and $q_2$ are the charges,and $r$ is the distance between them.
The formula for gravitational force is $F_g = \frac{G m_1 m_2}{r^2}$,where $G$ is the gravitational constant,$m_1$ and $m_2$ are the masses,and $r$ is the distance between them.