Hello. I have two string-bob pendulums of identical length and mass suspended on a loosely hanging rope. I set one of the pendulums into oscillations and notice that the two begin to slowly "trade" the momentums, ie after a moment the first one comes to a halt when the second is now oscillating with the original amplitude of the first one. The situation now reverses. I'm trying to determine how the time needed for one full transfer of momentum between the two pendulums will depend on their length (which is identical for both). The experimental result I obtained suggests the relation is linear, but I'm not so eager to believe it. The uncertainties are too big for me to really be sure about anything. I can't develop a theoretical model because the topic of oscillations we covered in class is not very advanced and I just wouldn't know how to go about that. Could you help me out and suggest a theoretical solution?