Specifically, they might be interested in:

* Classical mechanics: The study of the motion of objects and how forces affect them.

* Kinematics: Describing motion without considering the forces that cause it.

* Dynamics: Explaining the causes of motion, such as forces and torques.

* Newtonian mechanics: A branch of classical mechanics based on Newton's laws of motion.

* Other related areas: Fluid mechanics, thermodynamics, and even astrophysics all deal with aspects of motion and forces.

While "physicist" is the most general term, you might also hear terms like:

* Mechanician

* Motion analyst

* Force specialist

But, it's important to remember that these are not as common as "physicist" and might be used in specific contexts.