Levitation - online puzzles

Levitation (from Latin levitas " lightness ") is the process by which an object is held aloft, without mechanical support, in a stable position.

Levitation is accomplished by providing an upward force that counteracts the pull of gravity (in relation to gravity on earth ), plus a smaller stabilizing force that pushes the object toward a home position whenever it is a small distance away from that home position. The force can be a fundamental force such as magnetic or electrostatic, or it can be a reactive force such as optical, buoyant, aerodynamic, or hydrodynamic.

Levitation excludes floating at the surface of a liquid because the liquid provides direct mechanical support. Levitation excludes hovering flight by insects, hummingbirds, helicopters, rockets, and balloons because the object provides its own counter- gravity force.