What is the similarity between electric and gravitational forces?

Explanation

To answer the question about the similarities between electric and gravitational forces, we can break down the explanation into clear steps:

### Step-by-Step Solution:

1. **Definition of Forces**:
- **Gravitational Force**: The gravitational force (Fg) between two masses (m1 and m2) is given by the formula:
\[
F_g = G \frac{m_1 m_2}{r^2}
...