Consider a mechanical system as shown in figure below. (i) Construct the free-body diagrams of the system. Properly indicate and label all forces that exist in the system. (NOTE: Answer must be selected from the given choices provided below the figure)

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Q: D y

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Q: 35° 55° 60N

A: For solution refer below images.

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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.