The space (noncoplanar) structure presented is supported by ball-and-socket joints at O and D, and by a slider bearing at C. The two rigid members, OABC and AD, connected by a ball-and-socket joint at A, each have a mass of 75 kg/m. Determine the magnitude of the reaction force components at O and C.

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Free undamped vibrations

Whenever an object/system displaces in either side of its equilibrium position with the help of an external/internal means, then the object/system moves regularly or randomly on both sides of its equilibrium position. This motion is called vibration. Generally, there are three types of vibration: longitudinal vibration, transverse vibration, and torsional vibration.