过山车
Guò shān chē
You can also call it a "雲霄飛車" (Yun2 xiao1 fei1 che1)
Saddle up
rollchóstóir
tighten up
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.
I will say one thing. ultimaterollercoaster.com
roller coaster
Roller Coaster = rodilyo
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).
Twister - roller coaster - was created in 1999.