The problem of one tube and two balls on a plane

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The discussion revolves around a physics problem involving a tube and two balls, where participants express confusion about the setup and significance of the tube's infinite mass and its placement on a plane. Key points include the assumption that the tube is finite and closed at both ends, which affects the motion of the balls inside it. Participants debate the implications of the tube's orientation and whether it is stationary or moving, as well as the conditions under which the balls can collide. There is a consensus that the question lacks clarity and detail, particularly regarding the initial conditions and the nature of the collisions. Overall, the conversation highlights the complexities of the problem and the need for clearer definitions to facilitate understanding.
  • #61
crazy lee said:
In fact, it's still a bit difficult to discuss physical problems with others in a language without having a good command of that language. Besides, I'm not familiar with some of the rules on this website. I have seriously thought about this problem, but I haven't come up with any simple and effective ideas. Even if I take pictures of my notes and upload them, it won't be of any help to you, and the notes are all written in Chinese. So I hope some friends can be understanding. Thank you all.

After a long and productive PM discussion with the folks who have been trying to help you, this thread will remain closed just like your previous one. It seems that you have not been able to better define your question(s) since your original thread:

https://www.physicsforums.com/threa...ution-of-rigid-balls-in-a-vast-space.1050265/

You have an ill-defined problem statement and you keep moving the goalposts as others try hard to help you. That is not a good way to participate in a technical discussion forum. Please do not start yet another thread on this ill-defined problem.
 

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