ORIGINAL: Tim Green
IMHumblerO,
the formula for gravitational acceleration doesn't explain what causes gravity, what gravity is. The formula merely allows us to mathematically model gravity. So, do Newton's forumlas, or Bernoulli's, explain lift? Or do they merely allow us to mathematically model certain observed phenomena when air moves over a wing? Without explaining the cause(s) of lift?
Yes, it's a rather bizarre coincidence that we now how to very accurately predict how gravity will act under given circumstances through the theories of Newton and Einstein, but that we do not really know what gravity is. Nevertheless, in the macroscopic world we have not yet made any observations that do not obey either Newton's or Einstein's theories. Until such observations have been made physicists and engineers will stick with these models.