Question

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

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

Answer 1

The correct option is D Non-coplanar and concurrent forces

Since the vectors do not lie in the same plane, they are non-coplanar. But as thier lines of action intersect at a point, they are concurrent.
$\therefore$ The forces, which meet at one point, but thier lines of action do not lie in one plane, are called non-coplanar concurrent
forces.