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25-02-2024
Physics

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A punch is used to punch holes in a metal sheet, with shear stress (S) of 90 MPa and of 3 mm thick. (Hint: Force = As* Ssut ). Find the necessary force required to punch one square hole of 5cmx5cm.
A. 54kN
B. 54MN
C. 5.4kN
D. 6.9kN

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