The lever AB shown in the figure is attached to the horizontal axis BC that passes through the bearing and is welded onto the fixed bearing at C. The constant of torsion of the spring of the axis BC is K; that is, a couple of magnitude K is required to rotate r radián to end B of the shaft. If the shaft is known not to be twisted when the lever AB is horizontal, determine the value of θ  corresponding to the position of equilibrium if P = 150N, l= 325 mm and K = 13,5 Nm/rad. Solve by potential energy methodology and determine the stability of the equilibrium position

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Forced undamped vibrations

In mechanical engineering, vibration is expressed as the term that occurs due to an object's backward and forward movement about a point of equilibrium. Generally, there are three types of vibrations which are,