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kinetic
it would be the energy that is slowly increasing
When the roller coaster is at its highest position and is not moving then its potential energy is highest
When the roller coaster is at its highest position and is not moving then its potential energy is highest
The roller coaster increases kinetic energy when its velocity is increasing.
It depends on which type of roller coaster. Some of then use a magnet to get their speed. Other use a pressure, or they just let gravity do all the work.
The cars of a roller coaster reach their maximum kinetic energy when at the bottom of their path.
No, the roller coaster is not the only example of a closed energy system.
If you are talking about Saw the roller coaster, then it is a Gerstlauer Eurofighter.
there would be plenty of potential energy
The model uses less energy than the real one does.
When the roller coaster is at its highest position and is not moving then its potential energy is highest