- #1
Myr73
- 120
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A rod is made of two sections joined end to end. The sections are identical, except that one is steel and the other is brass. While one end is held fixed, the other is pulled to result in a change in length of 1.20mm. By how much does the length of each section increase ?
I understand that E (brass) = 1/2 E steel.
However first of all. when it change in length of 1.20 mm, is it talking about the complete change in length or just the one of the steel?
After that, I am unsure how to put the equation together. I understand that Change in L = 1/E (F/A) L0
But considering we don't have F and A. I know a previous explanation just took F/A out, but I can't see how that would work.
Thank you
I understand that E (brass) = 1/2 E steel.
However first of all. when it change in length of 1.20 mm, is it talking about the complete change in length or just the one of the steel?
After that, I am unsure how to put the equation together. I understand that Change in L = 1/E (F/A) L0
But considering we don't have F and A. I know a previous explanation just took F/A out, but I can't see how that would work.
Thank you