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Old Jul 8th 2017, 05:27 AM   #11
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Also, it is mentioned this:

d2l/dt2 = (F/2) / (ρdl) = F/(2m)

m - mass

If that can actually help for better explanation of the context...
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Old Jul 8th 2017, 05:31 AM   #12
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Looks like average force to me as I said.

Or if you prefer average acceleration since the acceleration varies from zero to max in a vibrating string.
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Old Jul 8th 2017, 05:49 AM   #13
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Originally Posted by studiot View Post
Looks like average force to me as I said.

Or if you prefer average acceleration since the acceleration varies from zero to max in a vibrating string.
So:
1) the equation is form of F=ma;
2) "2" stays for the fact that the maximum stress is twice the average stress.

Right?
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Old Jul 8th 2017, 05:54 AM   #14
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Works for me.

For your information the (strain) energy involved in stretching a string

E = 1/2 Max stress x strain = work done in raising the stress from zero to max. This is also = 1/2 Load x extension


I also think that the connection to waves is that your article must be about vibrating strings.
It would not involve Newton's Second Law for static stretching.

Last edited by studiot; Jul 8th 2017 at 06:00 AM.
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Old Jul 8th 2017, 06:09 AM   #15
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Originally Posted by studiot View Post
Works for me.

For your information the (strain) energy involved in stretching a string

E = 1/2 Max stress x strain = work done in raising the stress from zero to max. This is also = 1/2 Load x extension


I also think that the connection to waves is that your article must be about vibrating strings.
It would not involve Newton's Second Law for static stretching.
That's right!

I am re-examining the text now- it's all about vibrating string, not about static straining.

P.S. Please, have a look at your private inbox.
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Old Jul 8th 2017, 06:19 AM   #16
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Yes I saw the message, thank you.

We should keep the Physics in open forum for the benefit of all.

But I saw that you were translating this from another difficult language.

Your English is very good so I salute you for knowing more than one language as well as some Physics.
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