Question

A copper wire of 1mm diameter is stretched by applying a force on 10N . find the stress in the wire??

Answer 1

Stress = Force / Area
   
           = 10 / π r²
   
           =  10  
              π ( 10⁻³ )²
                 (  2    )
 
            =   4 × 10  
               3.14×10⁻⁶
 
          
            = 40 × 10⁶
                   3.14
  
            = 12.7 × 10⁶ N/m²

So the stress in the wire is 12.7 × 10⁶ N/m²

Answer 2

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