Now that we've found the force F12, which equilibrium equation will allow us to find the force F13 between joint 1 and 3?   Question 3 options:   Sum of torques = 0   Sum of horizontal forces = 0   Sum of vertical forces = 0

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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.