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Sahay Sir > Question Answers > MTG NEET Physics > Part 1 > Chapter 11 - SHM > A metal wire of length L1 ​and area of cross-section A is attached to a rigid support. Another metal wire of length L2 ​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 Y1 ​and Y2 ​are Young’s modules of the wires respectively, the effective force constant of the system of two wires is:

A metal wire of length L1 ​and area of cross-section A is attached to a rigid support. Another metal wire of length L2 ​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 Y1 ​and Y2 ​are Young’s modules of the wires respectively, the effective force constant of the system of two wires is:

An electric motor of mass 40 kg is mounted on four vertical springs each having constant 4000 Nm^-1. The period with which the motor vibrates vertically is