Kingda Ka was the world's tallest and fastest roller coaster when it first opened at Six Flags Great Adventure in 2005.

The coaster features a hydraulic launch mechanism and reaches its top speed in just 3.5 seconds. It's a good thing that the acceleration is so rapid, too, since the pinnacle of the roller coaster ...

While they don’t give the physical thrill of a real one, model roller ... speed and acceleration at each point along the track. The end result looks rather slow compared to other model roller ...