One girl will pull the other toward her. Both girls will stay in the same place. Gravity will cause the rope to sag. The rope will break.
I gave my students this multiple choice question: Two girls are pulling on opposite ends of a thick rope. Both girls pull on the rope with the same force but in opposite directions. If both girls continue to pull with the same force, what will most likely happen?

Only one answer is correct among these 4 choices:
- One girl will pull the other toward her.
- Both girls will stay in the same place.
- Gravity will cause the rope to sag.
- The rope will break.

Could you tell me which one is correct?

Both girls will stay in the same place.