You have "receptors" in your ears for this fundamental force, & they get upset when  you're weightless
The 
balls are spaced apart so that, from bottom to top, they get farther apart, just ...... 
the ball is weightless, and it was its weight (the force of gravity upon it) that was... [DOC] [TLE] Full text of "DISCOVERED QUESTIONS" - Internet Archive [PAR] What is that small bit of understanding that you are trying to get across?