Theoretical mechanics: based on Newton's law and analytical mechanics, the emphasis is on establishing the mechanical equation of the model.

Statics: only consider the balance of the object, generally only use the principle of virtual displacement or force/torque balance to get the equation.

Theoretical mechanics establishes scientific and abstract mechanical models (such as particles and rigid bodies). Both statics and dynamics are related to the physical cause of motion-force, which is collectively called kinematics. Some literatures confuse dynamics and dynamics as synonyms. Both of them can be translated into dynamics, or one of them can be translated into motion mechanics. In addition, combining kinematics and dynamics, theoretical mechanics is divided into statics and dynamics.