Steel on steel or steel on glass?

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Discussion Overview

The discussion revolves around the elasticity of collisions between marbles, specifically comparing steel on steel versus steel on glass. Participants explore the definitions and implications of elastic collisions in this context.

Discussion Character

  • Homework-related, Conceptual clarification, Debate/contested

Main Points Raised

  • One participant questions the nature of the problem, suggesting it resembles a homework question that may have a straightforward answer.
  • Another participant defines "elastic" in the context of materials and collisions, explaining that a completely elastic collision retains the original kinetic energy of the objects involved.
  • A participant expresses uncertainty about the meaning of "elastic" and seeks clarification.
  • Following the definition, a participant proposes that steel on steel is more elastic than steel on glass, arguing that steel retains its shape while glass may break upon impact.

Areas of Agreement / Disagreement

The discussion contains differing views on the nature of elasticity and the specific outcomes of the collisions, with no consensus reached on which collision is definitively more elastic.

Contextual Notes

Participants have varying levels of understanding regarding the concept of elasticity, and there are unresolved questions about the definitions and implications of elastic collisions.

dg_5021
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which collision of marbles is more elastic, steel on steel or steel on glass?
 
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That looks an awful lot like a homework problem where you were expected to just look up the answer!

Do understand what "elastic" means?
 
I don't know what elastic means?
 
A substance is said to be completley elastic, if it can retain it's original size and shape after being deformed. Everything we observe in nature are not completely elastic. In the present context, a completely elastic colission refers to a one in which the sum of the kintetic energies of the colliding objects remains the same before and after the collission
 
so then steel on steel is more elastic because it can retain it's original size and shape after being deformed and steel on glass won't because the glass will break. Am I right?
 

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