imagine a soft spring, just by holding it vertical in the floor it will compress, if you put it in a rocket and accelerate it it will compress as well
if you put it in a centrifugator you can compress it a lot
but if you put it inside a tube and swing the tube very fast certainly it will acelerate very fast but i think is very intuitive to see the spring on this case wont compress since holds on nothing as to compress if you suppose friction 0, just as if you acelerate it by dropping it and let gravity do its job
so with this method i think you could acelerate anything at very high speeds while it only will feel 0 g, very similar to gravity