>> > > Yes, in fact is does not take any energy to keep floating a few metres above >> > > Earth's surface. > >> >Well, it depends on how you make the object float. >> No, if you for example use a helicopter, it does not take energy to stay at >> that height but it does take energy to move all the air. >> Timothy Hold your arm out to you side. Tell me it takes no effort (energy) to hold it there. Kelly