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A rigid bar of mass 15 kg is supported s...

A rigid bar of mass 15 kg is supported symmetrically by three each 2.0 m long. Those at each end is to copper and the middle one is of iron. Determine the ratios of their diameters if each is to have the same tension.

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The correct Answer is:
`D_("copper")//D_("iron")=1.25`
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