Physical independence of force is a Consequcnce of

Options

A. first law of motion
B. second law of motion
C. third law of motion
D. all of these laws

Explanation

To solve the question "Physical independence of force is a consequence of," we will analyze the options provided and determine which law of motion relates to the concept of physical independence of force.

### Step-by-Step Solution:

1. **Understanding the Concept of Physical Independence of Force**:
- Physical independence of force refers to the idea that forces acting on an object do not influence each other. Each force can be considered independently when analyzing the motion of an object.

2. **Analyzing the Laws of Motion**:
- **First Law of Motion**: This law states that an object will remain at rest or in uniform motion unless acted upon by an external unbalanced force. This implies that the motion (or lack thereof) of an object is independent of other forces unless they are unbalanced.
- **Second Law of Motion**: This law relates the net force acting on an object to its mass and acceleration (F = ma). While it describes how forces affect motion, it does not directly address the independence of forces.
- **Third Law of Motion**: This law states that for every action, there is an equal and opposite reaction. This law describes interactions between two bodies but does not imply the independence of forces acting on a single object.

3. **Determining the Correct Option**:
- Given the definitions and implications of each law, the first law of motion is the one that most directly relates to the concept of physical independence of force. It emphasizes that an object’s state of motion is not influenced by other forces unless they are unbalanced.

4. **Conclusion**:
- Therefore, the correct answer to the question is the **First Law of Motion**.

### Final Answer:
The physical independence of force is a consequence of the **First Law of Motion**.