M2 Elasticity Watch

pippabethan
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#1
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#1
I was unsure what the 2 values of extension on part b actually meant?
I've attached my working for a and b.

I was stuck on c earlier but it's now solved (so you can ignore that picture)
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thefatone
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(Original post by pippabethan)
I was unsure what the 2 values of extension on part b actually meant?
I've attached my working for a and b.

I was stuck on c earlier but it's now solved (so you can ignore that picture)
Why TeeEm gone? :/ no more tagging him ;(

Student403 Zacken @anyone else who can help
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Student403
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I'm so braindead right now so I can't help right now sorry :sad:
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ghostwalker
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(Original post by pippabethan)
I was unsure what the 2 values of extension on part b actually meant?
The e= -0.6 is your original starting position.

And e=0.4 refers to the new position.

Note that e would not necessarily have been positive, although it is in this case.


I would do it with e being below B, i.e. assume it is a positive extension. The resulting quadratic I get has 0.6 and -0.4 as the two solutions. 0.6 being the starting position, and -0.4 being the desired position. Negative implies it's above B. And new length is original length plus extension = 1 + (-0.4) = 0.6 as desired.

Edit: As you have it, you have a positive quantity in a negative direction, which can be confusing.
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Zacken
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(Original post by thefatone)
Why TeeEm gone? :/ no more tagging him ;(

Student403 Zacken @anyone else who can help
You want help with mech, tag ghostwalker.
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ghostwalker
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(Original post by Zacken)
You want help with mech, tag ghostwalker.
Best not - I'm not going to be as active as I was, and there are others on here with more extensive mechanics experience.

Edit: But thanks for the thought.
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thefatone
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(Original post by Zacken)
You want help with mech, tag ghostwalker.
did you study stats or mechanics in school? or little bit of both?
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Zacken
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(Original post by thefatone)
did you study stats or mechanics in school? or little bit of both?
I am studying stats and mech, on my own, though. I'm doing S1-3, M1-3.
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thefatone
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(Original post by Zacken)
I am studying stats and mech, on my own, though. I'm doing S1-3, M1-3.
o.o i wish i could be like you :/
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Zacken
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(Original post by thefatone)
o.o i wish i could be like you :/
You really don't.
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Student403
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(Original post by thefatone)
o.o i wish i could be like you :/
**Replace the word "cat" with "Zacken"

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Zacken
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(Original post by Student403)
**Replace the word "cat" with "Zacken"
You calling me a pussy? :teehee:
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Student403
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(Original post by Zacken)
You calling me a pussy? :teehee:
I don't think everybody wants to be a pussy :rofl:
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thefatone
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(Original post by Zacken)
You really don't.
hmmm :/ i'd like to know a bit of both though...
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Zacken
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(Original post by thefatone)
hmmm :/ i'd like to know a bit of both though...
So self-study.
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thefatone
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(Original post by Zacken)
So self-study.
i dunno though i might if i have spare time to do so .... atm i'm really bad at chem and even worse at physics so i gotta get those up to scratch first :/
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maggiehodgson
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(Original post by ghostwalker)
Best not - I'm not going to be as active as I was, and there are others on here with more extensive mechanics experience.

Edit: But thanks for the thought.
Sorry to hear you won't be as active - I wondered why had hadn't seen your name for a while. So I would just like to thank you for all the replies you have made to my mechanics posts through the years. I eventually got as far as 1/2 way through edexcel M3 but I think I've reached my limit but I do continuue look at mechanics posts.

Enjoy whatever you will be doing instead of TSR.
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ghostwalker
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#18
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(Original post by maggiehodgson)
Sorry to hear you won't be as active
I'll still be around, for now, at least.

- I wondered why had hadn't seen your name for a while.
Best leave that one unanswered.

So I would just like to thank you for all the replies you have made to my mechanics posts through the years.
You're welcome.
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