Answer:

kinetics

Answer	Crossword Clue
KINETICS	Study of forces upon the body
KINETICS	Advanced physics subject
KINETICS	Moving subject

KINETICS	Subject of Newton's "Principia"
KINETICS	Branch of dynamics.
KINETICS	Branch of mechanics having to do with motion.
KINETICS	Science of motion.
KINETICS	Branch of mechanics.
KINETICS	Dynamics
KINETICS	Study of motion's forces