Discuss some salient features of gravitational, electromagnetic and nuclear forces.

Explanation

To discuss the salient features of gravitational, electromagnetic, and nuclear forces, we can break down each force into its key characteristics. Here’s a step-by-step solution:

### Step 1: Gravitational Force
1. **Nature of Force**: Gravitational force is an attractive force that acts between any two masses. It pulls objects toward each other.
2. **Mathematical Representation**: According to Newton's law of gravitation, the force \( F \) between two masses \( m_1 \) and \( m_2 \) is given by:
\[ F = \frac{G m_1 m_2}{r^2} \]
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