Mention one similarity between Coulomb force and gravitational force acting between two stationary charges.

Explanation

To find one similarity between Coulomb force and gravitational force acting between two stationary charges, we can follow these steps:

### Step 1: Define Coulomb Force
Coulomb force is the electrostatic force that acts between two stationary charges. It is given by the formula:
\[ F_c = k \frac{|Q_1 Q_2|}{R^2} \]
where \( F_c \) is the Coulomb force, \( k \) is Coulomb's constant, \( Q_1 \) and \( Q_2 \) are the magnitudes of the charges, and \( R \) is the distance between the charges.

### Step 2: Define Gravitational Force
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