Levitating Using Gravity
Most recent answer: 03/13/2019
- Juliet Wheeler (age 13)
Wapakoneta, Ohio, United States
That's a very nice idea, just the sort of thing a future physicist is likely to think about. As it happens, it won't work. There's a theorem due to Earnshaw that says that any gravitational arrangement, no matter how clever, is unstable. Your arrangement can have zero net force on the object, but there will always be some direction where a tiny wobble would accelerate away, like a pencil tipping over if it wobbles just a little from straight up.
(published on 03/13/2019)