at the bottom of the hill
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.
It is when the car is at its highest point.
On a pendulum, the greatest potential energy is at the highest point of the swing on either side, and the greatest kinetic energy is at the bottom of the swing. On a roller coaster, the greatest potential energy is at the top of a hill, and the greatest kinetic energy is at the bottom of the hill.
Kinetic energy begins changing to potential energy at the top of a roller coaster's highest point, typically referred to as the peak. At this point, the coaster's speed decreases as it moves upward due to the force of gravity, leading to a conversion of kinetic energy to potential energy.
rock and roller coaster
To bring the riders back to the starting point.
When going around a corner
The smallest roller coaster at Cedar Point is Wilderness Run. It is a kiddie roller coaster that is only 19 feet tall and goes 6 mph.
At the top of the track, the roller coaster has mostly potential energy due to its height above the ground. As it starts back down, this potential energy gets converted into kinetic energy as the coaster picks up speed.
The top of the first hill. This is where the coaster has its greatest amount of potential energy which is converted to kinetic energy as it moves along the track.
The newest roller coaster for Cedar Point is GateKeeper. It opened in May, 2013.
Mechanical energy is used on the chains that pull the roller coaster cars up the tallest incline, which is typically located at the start of the track. Mechanical energy is also used in the braking system that slows the cars to a stop at the end of the track.