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.
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.
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.
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
It depends on the roller coaster's height,speed,and location. :p
Potential energy is used when going up hill on a roller coaster. When it starts gong down the potential energy is converted to kinetic energy.
When the roller coaster - or any object, for that matter - is at its highest point, it has more potential energy than when it is at a lower point.
A roller-coaster would go faster with more people in it because with moer people the better the ride alsothe people that are ridding will give the roller-coaster potential energy. A roller-coaster would go slower with an empty car will give the roller-coaster kinetic energy than with peolpe in it.
electrical energy to sound, mechanical energy