Is move downhill in a roller coaster kinectic?

Yes, the move downhill in a roller coaster is kinetic. Kinetic energy is the energy of motion. When the roller coaster moves downhill, it gains speed and therefore gains kinetic energy. This is because the potential energy that the roller coaster had at the top of the hill is converted into kinetic energy as it moves down. The faster the roller coaster moves, the more kinetic energy it has.