A person in an artificial satellite of Earth feels weightlessness. But a person on the Moon has weight though the Moon is also a satellite of the Earth. Why?

Explanation

To understand why a person in an artificial satellite feels weightlessness while a person on the Moon feels weight, we need to analyze the situations of both cases step by step.

### Step 1: Understanding Weightlessness in an Artificial Satellite
1. **Concept of Artificial Satellite**: An artificial satellite is a man-made object that orbits the Earth. It is in free fall towards the Earth due to gravity but has a high tangential velocity that keeps it in orbit.

2. **Centripetal Force Requirement**: For the satellite to maintain its circular orbit, it requires a centripetal force. This force is provided by the gravitational attraction between the Earth and the satellite.

3. **Free Body Diagram**: Inside the satellite, a person experiences two forces: the gravitational force pulling them towards the Earth and the centripetal force required to keep the satellite in orbit. In the frame of reference of the satellite, both forces are equal and opposite, resulting in a net force of zero.
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