You're not giving quite enough information. At the moment you are interested in, is the roller coaster moving freely on the track, or is it under the control of a cog or other system? Is the roller coaster on its way down an incline, or on its way up?
velocity = speed of an object
Basically, as speed increases, velocity increases...
Velocity is constant when the middle of the roller coaster is parallel with the ground (when the tangent of the curve the roller coaster is on has a slope of 0 at the center of mass of the roller coaster).
Vertical Velocity - roller coaster - was created in 2001.
Going up and down
Yes
The roller coaster increases kinetic energy when its velocity is increasing.
the roller coaster would crack and break apart because of the velocity. It is to much for a roller coaster to handle.
From the time you start moving to the time you stop...
To slow it down, or decelerate. It is acceleration of a rollercoaster, or the change in the velocity vector that creates the thrill of a ride, not the speed. The design of the end of a coaster reverses the process.
The translation of the English word, 'Roller Coaster' is..Roller Coaster
Roller coaster's doesn't take the place of anything but it shows possession. Example: roller coaster's design
The slope of a roller coaster describes how steep the roller coaster is. Knowing the angle of the slope will tell you how steep a roller coaster is.
You ride in the seats of a roller coaster.