-axis of a Cartesian coordinate system, in terms of the instantaneous position, instantaneous velocity and instantaneous acceleration of the object: 
and 
[M4.1, M5.1, P2.1]
of: an object
is: motion of the object along a straight line.
can be represented: if the straight line is taken to be the -axis of a Cartesian coordinate system, in terms of the instantaneous position, instantaneous velocity and instantaneous acceleration of the object: and [M4.1, M5.1, P2.1]
Copyright 1997, The Open University