The forces, which meet at one point and their lines of action also lie on the same plane, are known as co-planar concurrent forces
The forces, which meet at one point and their lines of action also lie on the same plane, are known as co-planar concurrent forces
The forces which do not meet at one point and their lines of action do not lie on the same plane are known as non-coplanar non-concurrent forces
Co-planar concurrent forces are those forces which meet at one point and their lines of action also lie on the same plane
Non-coplanar concurrent forces are those forces which meet at one point, but their lines of action do not lie on the same plane.
Non-coplanar non-concurrent forces are those forces which do not meet at one point and their lines of action do not lie on the same plane.