On 08 Aug, Philip <joyphil@xxxxxxxxxxx> wrote: > I read somewhere that a flywheel of nominal mass will fall in a vacuum > due to gravity at a slower acceleration than the same mass falls if it > were not rotating. Like gravity is reduced? The leaning top does not > fall over while it is spinning, does it. No. The mass has increased owing to the increased energy. > I went into a university site once to seek an explanation of the gyro > effect seen in the precession of a simple toy the spinning top. Do you > know, there was two or more pages of mathmatical formulas and equations. > I reckoned they didn't know. You are being cynical again. It's quite complicated involving the conservation of angular momentum, so you probably wouldn't understand it. Alan Griffin