As one of the most important factors of Mechanical Engineering, it is important to note that when any rigid body is placed in space, those forces that are acting on the rigid body, may either be concurrent or non-concurrent.

In case concurrent forces are acting on it, resulting equation is ƩFx = 0, ƩFy = 0 and ƩFz = 0

In case, non-concurrent forces are acting on it, resulting value is ƩFx = 0, ƩFy = 0 and ƩFz = 0

While, it is also taken as: ƩMxy = 0, ƩNxz = 0 and ƩMyz = 0

In this case, force has 3 equations associated with it, while moment can be expressed by 3 equations as well.

**Links of Previous Main Topic:-**

- Fluid statics introduction
- Manometers measurement pressure
- Fluid kinematics
- Bernoullis equation
- Basics and statics of particles introduction
- Units and dimensions
- Laws of mechanics in basics and statics of particles
- Lamis theorem in basics and statics of particles
- Parallelogram and triangular law of forces
- Vectors
- Resolution and composition of a force
- Coplanar forces
- Resultant of coplanar forces
- Equilibrium of a particle
- Equilibrium of a rigid body
- Forces in space

**Links of Next Mechanical Engineering Topics:-**