Assertion : On earth's satellite, we feel weightlessness. Moon is also satellite of earth. But on the surface on moon, we do not feel weightlessness
Reason : Gravitational force by earth on us on the surface of moon is zero. But gravitational force by moon on us on its surface is non-zero.

Options

A. If both Assertin and Reason are correct and Reason is the correct explanation of Assertion
B. If both Assertion and Reason are correct but Reason is not the correct explanation of Assertion
C. If Assertion is true but Reason is false
D. If Assertion is false but Reason is true

Explanation

To solve the given problem, we need to analyze both the assertion and the reason provided in the question.

### Step-by-Step Solution:

1. **Understanding the Assertion:**
- The assertion states that on Earth's satellite, we feel weightlessness, and while the Moon is also a satellite of Earth, we do not feel weightlessness on the surface of the Moon.
- Weightlessness occurs in a satellite because it is in free fall towards the Earth, and everything inside the satellite (including the person) is falling at the same rate, creating a sensation of weightlessness.

2. **Analyzing the Situation on the Moon:**
- When we are on the surface of the Moon, we are not in free fall like we are in a satellite. Instead, we are standing on a solid surface, and the Moon exerts a gravitational force on us.
- The gravitational force on the Moon is about 1/6th that of Earth's gravity, which means we do feel a force acting on us, and thus we do not experience weightlessness.

3. **Understanding the Reason:**
- The reason states that the gravitational force exerted by the Earth on us when we are on the surface of the Moon is zero, while the gravitational force exerted by the Moon on us is non-zero.
- This statement is partially true: while the gravitational force from the Earth does decrease with distance, it is not zero; it is just significantly weaker than the gravitational force exerted by the Moon.

4. **Evaluating the Truth of Assertion and Reason:**
- The assertion is true because we do feel weightlessness in a satellite but not on the Moon's surface.
- The reason is misleading because it implies that the gravitational force from Earth is completely zero on the Moon's surface, which is not correct; it is just very small compared to the Moon's gravitational pull.

5. **Conclusion:**
- Therefore, the assertion is true, but the reason is false. The correct answer is that the assertion is true, but the reason is false.

### Final Answer:
The assertion is true, but the reason is false.