The problem of one tube and two balls on a plane

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Homework Help Overview

The discussion revolves around a problem involving a tube and two balls on a plane, with participants exploring the implications of the tube's mass and orientation, as well as the initial conditions of the balls. The context includes considerations of motion, collisions, and the physical setup of the scenario.

Discussion Character

  • Exploratory, Assumption checking, Conceptual clarification

Approaches and Questions Raised

  • Participants question the significance of the tube's mass and its orientation, whether it is on an airplane or a flat plane. There are discussions about the initial velocities of the balls and the nature of their collisions. Some participants suggest that the tube should be finite and closed at both ends, while others explore the implications of it being infinite.

Discussion Status

The conversation is ongoing, with various interpretations of the problem being explored. Some participants have offered insights into the nature of the collisions and the motion of the balls, while others are still questioning the assumptions made in the original problem statement.

Contextual Notes

There is ambiguity regarding the tube's length and mass, with some participants suggesting that the problem should clarify whether the tube is infinite or finite. The role of gravity is also debated, as well as the initial conditions of the balls and their velocities.

  • #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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