kinematics

https://doi.org/10.1351/goldbook.K03394
The study of the properties of motion that are independent of the nature of the forces. In @R05170@ the term is often applied in particular to effects that occur when atomic masses are changed, the forces remaining the same.
Source:
PAC, 1996, 68, 149. (A glossary of terms used in chemical kinetics, including reaction dynamics (IUPAC Recommendations 1996)) on page 170 [Terms] [Paper]