The translation of the English word, 'Roller Coaster' is..Roller Coaster
Roller Coaster = rodilyo
The plural is underwater roller coasters. The word underwater is an adjective describing roller coaster, adjectives don't take plural forms. Roller coaster is an open compound noun, the plural 's' goes on the end of the noun.
The word "coaster" in roller coaster refers to the method of travel. Roller coaster trains are not powered. Instead they coast from one hill to the next on a set of wheels (or rollers), hence the name.
I want to go on that roller coaster
Big dipper is another word for roller-coaster. Other words that can be used include turbulence, Sturm und Drang, and upheaval.
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.
La montaña rusa
roller coaster
You ride in the seats of a roller coaster.
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).