Engineering Mechanics is a branch of engineering that deals with the behavior of isolated systems, as well as systems consisting of many parts. The field has several sub-divisions, each of which covers a specific aspect of mechanics. Perhaps the most significant divisions are statics and dynamics.

Statics

Statics is the study of systems in equilibrium. It is concerned with forces, their effects and their relations to each other. Forces can be grouped into three categories:

• Axes – These are lines that pass through the center of mass and are perpendicular to the plane of rotation (momentum). An axis can be thought of as an imaginary line that connects two points on an object or system (such as a rod).
• Moments – A moment is the product of force multiplied by distance from its point of application; it’s represented by an arrow pointing away from this point.
• Couples – A couple