A single line indicates a bond between 2 atoms .
Momentum of the wagon increases by (200 x 3)
= 600 newton-sec
= 600 kg-m/sec
The first and third choices on the list will attract, because UNlike poles are facing across the gap.
Choice #1: . . . [S]-----[N] . . . [S]-----[N]
Choice #3: . . . [N]-----[S] . . . [N]-----[S]
Answer:
I think it's claim 1 because the same mass would cause them both to either fall off or to stay there
