On 09 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. > But Alan, The acceleration due to gravity is the same for any mass. > You have not explained it yet. Yes! You're quite right. I hadn't thought hard enough. On second thoughts, I don't believe that it would accelerate more slowly. Where did you get this from? Alan