Suppose your object is the only thing in space, how do you tell that it is spinning? How do the particles in the object can tell that the object as a whole is spinning?
What you describe are particules going in straight lines, but over what space/grid are they going on a straight lines? If they are going over straight lines on something then your description is one of an objective space.
If pulling forces are still exerted on its edges in proportion to said "spinning", then there exist a static field in space for which the object is in static alignment when the pulling force are at minima.
Interestingly the same observation could be made of two objects in orbit or the electrons orbiting individual atoms in the object, with the static alignment being observed when the acceleration between the objects is at a maxima i.e. they are falling into one another.
They are going in straight lines in relation to the other particles in the object. Then the force of one particle exerts on another particle as they get closer or further from each other, causing them to change direction. This happens for innumerable numbers of particles, appearing like a singular object that is spinning, since the forces are too great to pull the object apart. If you spin it fast enough, the particles will overcome the atomic forces holding it together, and the object will break apart, with the individual pieces continuing to move in a straight line.
What you describe are particules going in straight lines, but over what space/grid are they going on a straight lines? If they are going over straight lines on something then your description is one of an objective space.
If pulling forces are still exerted on its edges in proportion to said "spinning", then there exist a static field in space for which the object is in static alignment when the pulling force are at minima.
Interestingly the same observation could be made of two objects in orbit or the electrons orbiting individual atoms in the object, with the static alignment being observed when the acceleration between the objects is at a maxima i.e. they are falling into one another.