Find the false statement

Options

A. Gravitational force acts along the line joining the two interacting particles
B. Gravitational force is independent of medium
C. Gravitational force forms an action reaction pair.
D. Gravitational force does not obey the principle of superposition

Answer

To solve the question of identifying the false statement regarding gravitational force, we will evaluate each of the given statements step by step.

### Step-by-Step Solution:

1. **Evaluate Statement 1**:
- **Statement**: Gravitational force acts along the line joining the two intersecting particles.
- **Analysis**: According to Newton's law of universal gravitation, the gravitational force between two point masses acts along the line that connects them. This statement is true.

2. **Evaluate Statement 2**:
- **Statement**: Gravitational force is independent of medium.
- **Analysis**: The gravitational force between two masses depends only on their masses and the distance between them, not on the medium in which they are located. This statement is also true.

3. **Evaluate Statement 3**:
- **Statement**: Gravitational force forms an action-reaction pair.
- **Analysis**: According to Newton's third law of motion, for every action, there is an equal and opposite reaction. The gravitational force exerted by mass m1 on mass m2 is equal in magnitude and opposite in direction to the gravitational force exerted by mass m2 on mass m1. Thus, this statement is true.

4. **Evaluate Statement 4**:
- **Statement**: Gravitational force does not obey the principle of superposition.
- **Analysis**: The principle of superposition states that the total gravitational force acting on a mass due to multiple other masses is the vector sum of the individual forces exerted by each mass. This principle is indeed obeyed by gravitational forces. Therefore, this statement is false.

### Conclusion:
The false statement is: **"Gravitational force does not obey the principle of superposition."**