A 220 kg experimental engine is mounted on a test spring mounts at A and B, each with a stiffness of 105kN/m. The radius of gyration of the engine about its mass centre G is 115mm. With the motor not running, calculate the natural frequency (f), of vertical vibration and (f), of rotation about G. if vertical motion is suppressed and a slight rotational imbalance occurs, at what speed N should the engine not be run Rotation about G 250 mm-250 mm Kisa 0.25m N=95.2 rpm and N=1641 rpm N=150.6 rpm and N=543.6 rpm N=194.2 rpm and N=844 rpm N=295.2 rpm and N=641 rpm 10 kast

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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,