Assertion : On satellites we feel weightlessness. Moon is also a satellite of earth. But we do not feel weightlessness on moon.
Reason : Mass of moon is considerable.

Options

A. Both Assertion and Reason are true and the Reason is correct explanation of the Assertion.
B. Both Assertion and Reason are true but Reason is not the correct explantion of Assertion.
C. Assertion is true, but the Reason is false.
D. Assertion is false but the Reason is true.

Explanation

To analyze the assertion and reason provided in the question, we will break down the concepts involved in weightlessness and gravitational forces on satellites and the Moon.

### Step-by-Step Solution:

1. **Understanding Weightlessness in Satellites**:
- When an object is in a satellite orbiting the Earth, it is in free fall. The satellite and everything inside it are falling towards the Earth due to gravity, but they are also moving forward at a high speed. This creates a condition where the occupants of the satellite experience weightlessness because they are in a state of continuous free fall.

**Hint**: Remember that weightlessness occurs when there is no normal force acting on the body, which happens in free-fall conditions.

2. **Gravitational Forces in a Satellite**:
- In a satellite, the gravitational force acting on a person (weight = mg) is counteracted by the centrifugal force due to the satellite's circular motion. This balance of forces results in the sensation of weightlessness.

**Hint**: Consider how centrifugal force acts in a circular motion and how it relates to gravitational force.

3. **Analyzing the Moon as a Satellite**:
- The assertion states that the Moon is a satellite of the Earth. While it is true that the Moon is a satellite, it has a significant mass (approximately 1/6th of Earth's mass) which creates its own gravitational field.

**Hint**: Compare the mass of the Moon to that of the Earth to understand the gravitational effects experienced on the Moon.

4. **Feeling Weight on the Moon**:
- On the Moon, a person does not experience weightlessness because the Moon's mass is sufficient to exert a noticeable gravitational pull (though weaker than Earth's). Therefore, a person on the Moon will feel a reduced weight, but not weightlessness.

**Hint**: Recall that weight is the product of mass and gravitational acceleration (W = mg), and consider how the Moon's gravity affects this.

5. **Conclusion**:
- The assertion is true because satellites do indeed create a sensation of weightlessness. The reason is also true because the Moon has enough mass to exert a gravitational force that can be felt. Therefore, the correct conclusion is that both the assertion and reason are true, and the reason correctly explains the assertion.

### Final Answer:
Both the assertion and reason are true, and the reason is the correct explanation of the assertion.