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# Young modulus and moments question

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1. Attachment 524873524875Looking for some help on question 5, not sure what to do exactly
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2. (Original post by Purple K)
Attachment 524873524875Looking for some help on question 5, not sure what to do exactly
maybe use ?? not too sure about the first one

second one use the formula for strain which =

3rd obviously use formula for young modulus which is
use values from question and the tension you worked out in part A
then use formula for strain which is
3. Do you know the answers?
I don't know if I'm correct but if I had to answer it in an exam I would get

Tension in both = 49.05N

Extension = 1.7mm

Diameter = 8.57x10^-4 m

But like I said, these are just guesses.
4. Hmm I haven't been able to look through it yet with my teacher but I got some different answers so I'm not entirely sure
5. (Original post by MHD30)
I don't know if I'm correct but if I had to answer it in an exam I would get

Tension in both = 49.05N

Extension = 1.7mm

Diameter = 8.57x10^-4 m

But like I said, these are just guesses.

I like your answers. One should be able to obtain an exact answer for the diameter if algebraic manipulation is used - mm.

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