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Three vertical wires, I,II and III are s...

Three vertical wires, `I,II` and `III` are supporting a block of mass `M` in horizontal positon. The wires are to equal length and cross-sectional area. It is given that Young's modulus of wire `II, Y_(2) = Y_(3)` (Yong's modulus of wire `III`). The wire `I` and `III` and attached at extreme ends of the block.

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