Q. A metal wire of length $L_{1}$ and area of cross-section $A$ is attached to a rigid support. Another metal wire of length $L_{2}$ and of the same cross-sectional area is attached to the free end of the first wire. A body of mass $M$ is then suspended from the free end of the second wire. If $Y_{1}$ and $Y_{2}$ are the Young’s moduli of the wires respectively, the effective force constant of the system of two wires is
Mechanical Properties of Solids
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