----- Original Message ----- From: "Harry Veeder" <[EMAIL PROTECTED]> Sent: Saturday, July 28, 2007 6:43 AM ... > Here is another way looking at it. For the sake of balance, imagine a wheel > is setup on opposite sides of the equator. One wheel has the brake on and > the other has the brake off. > > If you could stop the Earth rotating, the wheel that has the brake on will > continue to remain at rest wrt to the ground but the other wheel will > continue to turn once per day wrt to the ground. > > The two motions differ, but the difference is masked by the rotation of the > Earth. > > Do you agree?
I would say on the contrary that they do not differ, unless the Earth stops rotating. Releasing a brake between parts which have no tendency to move wrt each other will make no difference whatsoever, agreed? Michel
