Question

what are the sub branches of therotical physics

Answer 1

There are many branches of classical mechanics, such as: statics, dynamics, kinematics, continuum mechanics (which includes fluid mechanics), statistical mechanics, etc. Mechanics: branch of physics in which we study about the object and properties of an object in form of motion under the action of force.

Answer 2

Classical mechanics
Thermodynamics
Quantam mechanics
Relativity
Condensed matter physics..