TYPES OF FORCES
The force system may be classified as follows :
5.1 Coplanar
When the system of forces are in a plane, it is called coplanar system of forces
1.5.1.1 Collinear
When the system of forces are having common lines of action, it is called collinear system of forces.
1.5.1.2 Concurrent
When the forces intersect at a common point, they are called concurrent forces.
1.5.1.3 Parallel
When the forces are parallel, they are called parallel forces.