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P-7. The steel shaft shown in the figure rotates at 6.40 Hz with 42 kW
taken off at A, 27 kW removed at B, and 69 kW applied at C. Using G = 110
GPa. The shear stress developed @ BC is_
MPa
A
B
55 mm ¢
65 mm o
4 m
2 m
12.173
16.747
20.505
25.942
31.821

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