Mechanics is a subject that is concerned with what happens to the motion of an object when forces are acting on it. Mechanics can be divided into three branches1:
- Rigid-body mechanics (under the assumption that forces acting on the object cause no deformation upon the object)
- Deformable-body mechanics
- Fluid mechanics
- Statics
- Dynamics
An object is said to be in equilibrium when it is static or moving at constant velocity (not accelerating)
Dynamics on the other hand deals with object that are accelerating.
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