There are few specific equations that need to be considered:

∑ F̅ = 0

Here in this equilibrium state, the rigid body will have no effects with external forces.

∑ F̅_{x}= 0

∑ F̅_{y} = 0

∑ F̅_{z}= 0

In these three equations there will be no moment as the result out of any direction x, y or z.

**Links of Previous Main Topic:-**

- Introduction to statics
- Introduction to vector algebra
- Introduction concept of equilibrium of rigid body
- Equilibrium in two dimensions

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