what is the difference between classical mechanics and classical physics ?

physics is the study of the surroundings but mechanics is the study of the relative motion of the mechanisms....!

Hello,

There is as such no difference between classical mechanics and classical physics as both the things refer to the same thing i.e. the mechanisms followed by different objects in and around us and following Newtonian Mechanics in particular.

classical physics" refers to depends on the context. When discussing special relativity, it refers to the Newtonian physics which preceded relativity, i.e. the branches of physics based on principles developed before the rise of relativity and quantum mechanics. When discussing general relativity, it refers to the result of modifying Newtonian physics to incorporate special relativity. When discussing quantum mechanics, it refers to non-quantum physics, including special relativity, and general relativity.

classical mechanics and quantum mechanics are the two major sub-fields of mechanics. Classical mechanics is concerned with the set of physical laws describing the motion of bodies under the action of a system of forces. The study of the motion of bodies is an ancient one, making classical mechanics one of the oldest and largest subjects in science, engineering and technology.