Finding the velocities of two balls before they touch each other

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Homework Help Overview

The discussion revolves around a problem in classical mechanics involving two balls with different masses and a specified distance between them. The original poster seeks to determine their velocities just before they make contact.

Discussion Character

  • Exploratory, Conceptual clarification

Approaches and Questions Raised

  • Participants explore the application of conservation of energy and momentum as potential methods for solving the problem. There is some uncertainty about whether these principles can be applied in this context.

Discussion Status

The conversation is ongoing, with participants considering different approaches to the problem. Some guidance has been offered regarding the use of conservation laws, but there is no explicit consensus on the method to be used.

Contextual Notes

There is a mention of the original poster's uncertainty about the inclusion of conservation principles in the problem-solving process, indicating possible constraints in their understanding or the problem's requirements.

Eitan Levy
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Homework Statement


Two balls are given, the distance between their centers is 8R. Both have a radius of R.[/B]
One ball has a mass of 2m and the other has a mass of m.
The question is: What will be their velocities right before they touch each other
Answer: Vm=√(GM/R), V2m=0.5√(GM/R)

Homework Equations


F=GMm/r2

The Attempt at a Solution


I tried this equation:
9QEWW
https://imgur.com/a/9QEWW , but I don't know how to continue.
Thanks a lot![/B]
 
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Have you tried using conservation of energy and momentum?
 
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Chandra Prayaga said:
Have you tried using conservation of energy and momentum?
Ohhhh, I thought those questions don't include them, so this is the only way to solve it?
 
That is certainly a very simple way.
 

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