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A heavy plank of mass 100 kg hangs on th...

A heavy plank of mass 100 kg hangs on three vertical wires of equal length arranged symmetrically (see figure). All the wires have the same cross - section.
The middle wire is of steel and the other two are of copper . The modulus of elasticity of steel is assumed to be double that copper. Determine the tensions in the wire. (use `g=9.8ms^-2` )

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