Assertion: roller coaster's energy | /r/HasProperty | released
Facets:
Source sentences:
text: If a continuous-circuit roller coaster does not have enough kinetic energy to completely travel the course after descending from its highest point (as can happen with high winds or increased friction), the train can valley: that is, roll backwards and forwards along the track, until all kinetic energy has been released.
text: Some of the kinetic energy is now being converted to potential energy, which will be be released when the cars go down the other side.