How can you calculate change in length without force and area units?

[chriscarson]

Homework Statement

Change of length formula when you don t have the AREA and the FORCE unit.

Relevant Equations

Change of length formula when you don t have the AREA and the FORCE unit.

I have the STRESS , YOUNG S MODULUS ,and the LENGTH .
How can you discover the CHANGE IN LENGTH when you don t have the FORCE and AREA unit ?

 

[BvU]

What stress do you have ? What does it mean ?

 

[chriscarson]

I meant I have the unit of the stress 4 x 10 2 (the 2 is little on the 10 )

 

[BvU]

I don't see no units ?

 

[chriscarson]

I just asked the question without giving the measurements .I think it s enough .

 

[BvU]

Good. Then you are all set.

 

[chriscarson]

Is it change of length = strain x length ?

 

[BvU]

With units I mean things that tell you the dimension in terms of kg, m and s, the so-called SI units.
I don't care about the numerical value, that's only needed when you need to calculate.

 

[BvU]

Is it change of length = strain x length ?

That seems to be the case ! (but I'm mising the Young thingy now?)
https://en.wikipedia.org/wiki/Young's_modulus
https://en.wikipedia.org/wiki/Stress_(mechanics)

 

[chriscarson]

ok thanks , I wish to have all the formulas possible to need in any case .