Discipline of Forces Producing or Changing Motion

This page is the CodyCross answer for the clue below from Medieval Times, Group 230, Puzzle 2 (Viking Expansion).

Question is: Discipline of Forces Producing or Changing Motion

and the answer is: KINETICS

Word Meaning:

KINETICS — (mechanics) The branch of mechanics concerned with motion of objects, as well as the reason i.e. the forces acting on such bodies. This, along with kinematics constitute dynamics, which is concerned purely with the effects of forces on moving bodies.

Definitions from Wiktionary.