Roller Coaster

An amusement railroad of varying design in which open cars coast by gravity over a long winding track in a closed circuit with steep pitches and ascents and in some cases loops in which the cars are briefly upside down typically the cars are pulled by a chain device to the top of the first peak after which gravity and momentum provide the only propulsive forces In some cases the cars are suspended from a monorail rather than resting on a track and such cars may be made to swing outward at an angle near to the horizontal It is a popular amusement at many amusement parks but is sufficiently frightening to some people that they refuse to ride in one