A square platform \(P Q R S\) and a car that it is supporting have a combined mass of \(M\). The platform is suspended by four elastic wires from a fixed point \(O\), as indicated in Fig. 2.72. The vertical distance between the point of suspension \(O\) and the horizontal equilibrium position of the platform is \(h\). If the side of the platform is \(a\) and the stiffness of each wire is \(k\), determine the period of vertical vibration of the platform.

Transcribed Image Text:

Po R FIGURE 2.72 Car suspended by four wires.