Physical independence of force is a consequence of

Options

A. Third law of motion
B. secon law of motion
C. first law of motion
D. All of these

Answer

### Step-by-Step Solution:

1. **Understanding the Concept**: The question asks about the "physical independence of force." This concept refers to the idea that the effect of a force on an object is independent of other forces acting on that object.

2. **Relating to Newton's First Law**: The physical independence of force is closely related to Newton's First Law of Motion. According to this law, an object will remain at rest or in uniform motion in a straight line unless acted upon by a net external force.

3. **Definition of the First Law**: The First Law states that every body continues to be in a state of rest or uniform motion unless compelled to change that state by an external force. This means that the presence of other forces does not alter the state of motion of an object unless there is a net force acting on it.

4. **Conclusion**: Therefore, the physical independence of force is a consequence of Newton's First Law of Motion, which emphasizes that forces do not influence the motion of an object unless they are unopposed by other forces.

### Final Answer:
The physical independence of force is a consequence of Newton's First Law of Motion.

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