Assertion: elevator's acceleration | /r/HasProperty | downward
Facets:
Source sentences:
text: the elevator has no acceleration (standing still or moving with constant velocity) the elevator has an upward acceleration (accelerating upward, or decelerating while on the way down) the elevator has a downward acceleration (accelerating down, or decelerating while on the way up)
text: N = mg - ma if the elevator has a downward acceleration