How's exactly defined the curvilinear abscissa in kinematics? Surfing on the net I found different definitions: a) Fixed a point $O$ and a direction, the curvilinear abscissa $s$ at a point $P$ is ...
(I know whether I understand this or not doesn't matter much to my work & study but am just curious.) I still can't differentiate in my head kinetics and kinematics (similar thread is found but ...
What is the "official" or most useful definition of displacement in the context of kinematics? There are two common ones: Displacement is the length and direction of a line from a fixed reference ...