  It is fundamentally possible to travel with zero energy based on Newton Laws
of Motion. According to the first law of motion, a body will continue to travel
for infinite distance unless it is acted upon by another force. For a body in
motion, the force which stops perpetual motion is friction. However, there are
many circumstances that friction is zero, for example in space, where there is
vacuum. On earth, gravity makes objects to be in constant contact with each
other generating friction but technology exists to separate them in the air
using powerful magnetic forces. At low speeds, the friction caused by air is
minimal but we can create vacuum even on land for high speed travel. Another
condition for travelling is for it to stop at its destination. On land, we can
recover the kinetic energy back into electrical energy using brushless
permanent magnet generators. These generators can also convert electric energy
into kinetic energy in order to provide motion. This article reviews
technologies that will allow us to travel with zero energy. It is easier to do
it on land but in the air, it is not obvious.
