A rigid block of mass M is supported by three symmetrically spaced rods as shown...

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Calculus

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A rigid block of mass M is supported by three symmetrically spaced rods as shown in figure Each copper rod has an area of 750 mm 2 E 120 GPa and the allowable stress is 75 MPa The steel rod has an area of 1100 mm 2 E 200 GPa and the allowable stress is 150 MPa Determine the largest mass M which can be supported Copper 145 mm A 12 857 23 kg B 25 800 kg C 21 629 71 kg D 15 900 kg M Steel 200 mm Copper 145 mm

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