Why Does Pulling the Lace Differently Result in Different Outcomes?

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Homework Help Overview

The discussion revolves around a physics problem involving the behavior of strings when pulled at different speeds. The original poster describes a scenario where pulling one string quickly results in it tearing, while pulling another string slowly leads to a different outcome. The context suggests an exploration of the mechanics involved, possibly relating to tension and material properties.

Discussion Character

  • Exploratory, Assumption checking, Conceptual clarification

Approaches and Questions Raised

  • Participants are attempting to clarify the original poster's question, with some suggesting that the differences in tearing are related to the speed of pulling and the properties of the strings. There is a call for the original poster to provide their reasoning or attempts to understand the underlying physics, particularly referencing Newton's laws and the elasticity of strings.

Discussion Status

The discussion is ongoing, with participants emphasizing the need for the original poster to demonstrate their understanding or attempts at solving the problem. There is a focus on guiding the original poster towards a deeper exploration of the mechanics involved, rather than providing direct answers.

Contextual Notes

Participants note that the original poster must adhere to forum rules, which require showing attempts at a solution and relevant equations before receiving assistance. This has led to some frustration regarding the perceived lack of effort in the original post.

msitworld
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Homework Statement



in Attachment picture :

if we pull the lace B fastly torn himself

but if pull it slowly the lace A be torn .

why ?

Homework Equations


The Attempt at a Solution

 

Attachments

  • TORN LACE.JPG
    TORN LACE.JPG
    2.3 KB · Views: 385
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Sorry, can you reword this using proper English as it is very difficult to understand what you are asking.

Also, please show your attempt at a solution.

Jared
 
I think he's trying to say that if you pull the end of the string fast string B will be torn while if you pull the string slow, string A will be torn

maybe..
 
Acuben said:
I think he's trying to say that if you pull the end of the string fast string B will be torn while if you pull the string slow, string A will be torn

maybe..
That is exactly how I read it.

msitworld: as stated above, you must show an attempt to answer 'why' this is the case. It is not an easy task to do so, but you have to start somewhere, in consideration of Newton's laws and the fact that strings are not rigid; they stretch. Give it a try, and perhaps someone will help. Welcome to PF!
 
yes acuben
if you pull the string B fast it will be torn while if you pull it slow, the string A will be tornwhy Why this happens ? what is the Difference between first and second mode results ?
 
msitworld, you must show an attempt to answer this, not just demand an answer.

Otherwise you won't get any help.

Jared
 
what help ?
 
You want help answering the question.

We can only assist you in getting to the answer, we can't give you the answer.

You must show an attempt before anyone can help you get to the answer.

Jared
 
msitworld said:
what help ?
When you posted your problem, the template that shows up clearly indicates that you must list your relevant equations and show an attempt at a solution before you can receive assistance with your problem. Once you do, I'm sure someone would be glad to assist in this not so easy to understand problem. These are forum rules. If it's just an answer you are looking for, you should ask your question on another website. Thank you for your understanding.
 

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