I think it's a question of relativity. To people observing it from "outside" it is three-dimensional. But to a being trapped on it's surface, it would appear to be two-dimensional.
Your mass is not hurtling through space and time if time does not change. My question is: What is causing (forcing) time to change? What force caused yesterday to become today? What force will cause today to become tomorrow?
Sorry to be so confusing. My reference to muons was simply an introduction to the idea of a "fifth force. In retrospect, I should have left it out and just jumped directly into my question about time as a force. My sincere apologies to muon fans.
We all know the four fundamental forces in physics: gravity, electromagnetism, and the strong and weak nuclear forces; and there is now some discussion about a fifth, more obscure force involving muons.
But I have a question; could the fifth force be something we deal with every day? Could it...