I have a question about constant acceleration. According to the book, constant acceleration is when the average acceleration is equal to the instantaneous acceleration. So, if an object experiences no acceleration, i.e. an acceleration of zero (0) m/s^s, is this considered constant acceleration? The average at any time is zero, as well as for the instantaneous accleration. So, by that broad definition, is zero considered constant? The book does not clearly establish if zero acceleration is even considered acceleration, much less whether or not it is considered constant. I would greatly appreciate a little clarification. thanks!
If the the object has zero instantaneous acceleration for some span in time then for that span in time it has uniform acceleration with zero magnitude. Zero acceleration is an acceleration, just with zero magnitude. Motion with constant velocity is just a special case of motion with uniform (i.e. zero) acceleration.