Assertion: roller coaster | /r/Desires | gravity
Facets:
value: to allow
type: PURPOSE
value: for acceleration
type: PURPOSE
Source sentences:
text: Most roller coasters rely totally on gravity for acceleration, they are designed so that they accelerate downhill in order to make it to the next peak of a vertical curve, to start the acceleration again, this is repeated over a number of times until the end.
text: In this book, co-written by Leopold Infeld, Einstein explained that roller coasters convert potential energy into kinetic energy, and depend solely on gravity and momentum.
text: Roller coasters rely only on gravity to allow the coaster to move.