Question

The forces which do not meet at a point are called

• A. Non-coplanar forces
• B. Coplanar forces
• C. Concurrent forces
• D. Non-concurrent forces

Hint:

Remember the key prefix:
- Co- Con- = Together (e.g., Coplanar = same plane; Concurrent = same point).
- Non- = Not (e.g., Non-concurrent = lines of action do not meet at a single point).

Answer 1

The Correct Option is D

Step 1: Understanding the Concept:
Forces are classified into distinct systems based on the arrangement of their lines of action in three-dimensional space.
The primary classifications include coplanar/non-coplanar systems and concurrent/non-concurrent systems.

Step 2: Detailed Explanation:
Let us define the terms used to classify force systems:
- Coplanar forces: Forces whose lines of action all lie in the same single plane.
- Non-coplanar forces: Forces whose lines of action do not lie in the same plane.
- Concurrent forces: A system of forces whose lines of action all pass through a single, common point of intersection.
- Non-concurrent forces: A system of forces whose lines of action do not intersect at a single, common point.
Therefore, forces whose lines of action do not meet at a common point are classified as non-concurrent forces.

Step 3: Final Answer:
The forces that do not meet at a point are called non-concurrent forces. Hence, the correct option is (D).