fast
Contributor
the distance value being zero, nothing measured as distance for a given time means it is not moving.What made it stop moving? It's not moving relative to the other objects, but we're not discussing it's movement to other objects. We're discussing whether or not it's moving.
and if the object were the only thing, and that being singularity, the speed would be undefined...
What is up with this need to do math? I'm not out to make a calculation. I don't even care to measure any distance. I've already acknowledged that distance may be problematic to figure out when dealing with few to no objects. The issue isn't in figuring out the distance travelled but rather if (if, i say) an object is moving or isn't moving. Suppose an object strongly collides with another object of the same size and density and they change direction. The inertia from post impact alone suggests that the increasing distance is a function of the fact that both objects are moving. If one of the objects suddenly dissipates, there's no good reason to think the other object has even slowed down, let alone stopped.
All this jazz about it not moving because there's not another object moving relative to it goes to show you're more concerned about relativity, distance determination, and calculations. We don't need a formula. We just need to think through this and rule out why we know the object is moving despite the disappearance of our evidence not that it was (but rather is) in fact moving--while all the while remembering that the theory of relativity is not at issue.