Question about elastic deformation.

  • Thread starter da_coolest
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  • #1
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Hi.. I need a good explanation for the following question. an explanation with a small mathematical calculation to prove the answer would be highly helpful.

A copper rod of cross-section 10 mm  10 mm is stretched along its axis, changing length from 1.000 m to 1.001 m. The deformation is elastic, or fully recoverable. Given that the modulus of copper is 110 GPa, the stress on the rod is approximately (choose the closest answer):

A 110 kPa
B 110 MPa
C 110 GPa
D 1/110 MPa
E 1/110 GPa



thanks in advance!
 

Answers and Replies

  • #2
Astronuc
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What is the relationship between stress and strain for elastic deformation?

What is the strain for a bar stretched 1.000 m to 1.001 m?
 
  • #3
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What is the relationship between stress and strain for elastic deformation?

What is the strain for a bar stretched 1.000 m to 1.001 m?

young's modulus

thanks, now i got an idea about how to do the calculation. to which units i should convert these into when calculating?
 
  • #4
Astronuc
Staff Emeritus
Science Advisor
19,182
2,633
young's modulus

thanks, now i got an idea about how to do the calculation. to which units i should convert these into when calculating?

Strain is a ratio, and is dimensionless, or written as m/m or cm/cm or in/in.
 

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