Among the known types of forces in nature, the gravitational force is the weaknest. Why then does it play a dominant role for motion of bodies on the terrestrial astronomical and cosmological scale?

Explanation

To understand why gravitational force, despite being the weakest of the known forces, plays a dominant role in the motion of bodies on terrestrial, astronomical, and cosmological scales, we can break down the explanation into several key points:

### Step-by-Step Solution:

1. **Understanding Gravitational Force**:
- Gravitational force is the force of attraction between two masses. It is described by Newton's law of universal gravitation, which states that the force is directly proportional to the product of the masses and inversely proportional to the square of the distance between them.
- Formula: \( F = G \frac{m_1 m_2}{r^2} \)
- Here, \( G \) is the gravitational constant, \( m_1 \) and \( m_2 \) are the masses of the two objects, and \( r \) is the distance between their centers.
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