Question: Question 3: A flat steel disc has a uniform thickness of 10 mm and an outer radius of 100 mm. The largest elastic shear

Question 3: A flat steel disc has a uniform thickness of 10

Question 3: A flat steel disc has a uniform thickness of 10 mm and an outer radius of 100 mm. The largest elastic shear stress is not to exceed 84 MPa. What rotational speed is permissible if: (a) The disc has a central hole of radius 40 mm. (b) The disc has no hole. Assume p = 7860 kg/m3 and v = 0.27.

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