Assertion: acceleration | /r/HasAspect | direction
Facets:
Source sentences:
text: Because acceleration has both a magnitude and a direction, it is a vector quantity.
text: This acceleration can be called a deceleration because it has a direction opposite to the velocity.
text: Accelerations are vector quantities (in that they have magnitude and direction).
text: Acceleration is a vector, and thus has a both a magnitude and direction.