For what value of w (frequency of the forced harmonic excitation) does the system described by ÿ+9y = 4cos(wt)exhibit resonance ? O 81 O 4 O 3 O never 9. * Previous

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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,