Quite simple, yes. It's a law that applies to more than just a bouncing ball. I like your description of the ball as "soiled." One of those tiny details that specifies a metaphor so precisely that I might almost be able to decipher your personal meaning for the poem, if I knew you a little more than I do.
Thanks for the thoughts.
"Faith" means the will to avoid knowing what is true.
~ Friedrich Wilhelm Nietzsche