Which statement about final rest is true?

• A. The final rest includes movement after disengagement
• B. The location where the unit comes to rest after collision, excluding movement after disengagement
• C. The final rest position is identical to the stabilized position
• D. The final rest position is always the point of impact

Answer: (B)

Final rest is the position the unit settles into after a collision, representing the final resting place once all immediate post‑impact motion has ended. This definition intentionally excludes any movement that occurs after the unit disengages from what it collided with, because that subsequent travel isn’t part of the unit’s resting state from the collision event.

This makes the statement accurate: it pins final rest to where the unit actually comes to rest after the collision, not the moment of impact or any motion that happens after disengagement. In a collision, the object can bounce, slide, or detach and then continue moving, so the true resting spot is somewhere after those movements have ceased. The other ideas—being at the point of impact, being identical to a stabilized position, or including movement after disengagement—don’t match how final rest is defined.