Define orbital velocity. Obtain the relation between orbital velocity and acceleration due to gravity g, for a satellite orbiting very close to the surface of the earth.

Explanation

### Step-by-Step Solution

1. **Definition of Orbital Velocity**:
Orbital velocity is defined as the velocity required for a satellite to maintain a stable orbit around a planet. It is the speed needed to balance the gravitational pull of the planet with the inertial force due to the satellite's motion.

2. **Consider the Scenario**:
Let's consider a satellite of mass \( m \) orbiting the Earth, which has a mass \( M \) and a radius \( R \). If the satellite is at a height \( H \) above the Earth's surface, the distance from the center of the Earth to the satellite is \( R + H \).

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