A 8mm thick copper sheet is cut with a 9 cm diameter round punch. if the punch exerts a force of 16 KN, Find the sgear stress in the sheet

- 1
  
  9.80 MPa
- 2
  
  11.43 MPa
- 3
  
  7.08 MPa
- 4
  
  17.86 MPa

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