What is happening between Points

A-B? Point A and Point B are examples of potential energy, there is not energy transformation taking place here.

Point A is demonstrating kinetic energy, as the roller coaster moves downhill the kinetic energy is transformed into potential energy.

Point A and Point B are examples of kinetic energy, there is not energy transformation taking place here.

Point A is demonstrating potential energy, the potential energy is then transformed into kinetic energy as the coaster moves downhill.