When a mechanics problem or system has more than one force act on a body, it is known as a system of force OR Force system.
There is a various system of forces following below :
1. Coplanar forces: The forces, whose line of action lie on the same plane that is known as coplaner forces.
There are four types of coplanar forces system :
- Collinear force system: When the lines of action of all the forces of a system act along the same line, this force system is called collinear force system.
- Parallel force system: When the line of action of all the forces of a system is different and parallel to each other, this force system is called a parallel force system.
- Concurrent force system: When the forces extended and it passes through a single point this system is called the concurrent force system.
Concurrent forces may or may not be coplanar.
- Non-concurrent force system: In the system, all the forces do meet at a common point of concurrency, this force system is called non-concurrent force system.
Parallel forces are an example of this type of force system.
Non-concurrent forces may be coplanar or non-coplanar.
2. Non-coplanar forces: The forces, whose line of action don't lie on a single plane is called non-coplanar forces or Space forces.
There is three non-coplanar force system :
- Parallel force system: When the line of action of all the forces of a system is different and parallel to each other and also both are in a different plane, this force system is called parallel force system.
- Non-coplanar concurrent forces: When all the forces in the system meet at one point but their lines of action don't lie on the same plane that type of system is known as non-coplanar concurrent forces.
- Non-coplanar non-concurrent forces : The forces that are not meet at one point and their lines of actions do not lie on the same plane are called non-coplanar non-concurrent forces.