The forces, which meet at one point but their line of action do not lie in one plane,are called

Options

A. non- copanar non-concurrent fores
B. non - copanar concurrent forces
C. coplanar concurrent forces
D. coplanar non- concurrernt forces

Answer

To solve the question, we need to understand the definitions of coplanar and concurrent forces.

### Step-by-Step Solution:

1. **Understanding Forces**:
- Forces are vector quantities that have both magnitude and direction. They can act at a point in space.

2. **Definition of Coplanar Forces**:
- Coplanar forces are those forces whose lines of action lie in the same plane. This means that if you were to draw the lines of action of these forces, they would all be contained within a flat surface.

3. **Definition of Concurrent Forces**:
- Concurrent forces are those that meet or act at a single point. This means that regardless of the direction or the plane they are in, they all converge at one point.

4. **Analyzing the Given Question**:
- The question states that the forces meet at one point but their lines of action do not lie in the same plane. This means that while they are concurrent (acting at the same point), they are not coplanar (not all in the same flat surface).

5. **Conclusion**:
- Since the forces meet at one point but do not lie in the same plane, they are classified as **non-coplanar concurrent forces**.

### Final Answer:
The forces which meet at one point but their line of action do not lie in one plane are called **non-coplanar concurrent forces**.

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