engineering recuitment GATE ME 2023-24 Test Series Mechanical Vibrations Undamped Free Vibration Equivalent Stiffness
An automotive engine having a mass of 135 kg is supported on 4 springs with linear characteristics. Each of the 2 front springs have stiffness of 3 MN/m while the stiffness of each of 2 rear springs is 4.5 MN/m. The engine speed (RPM) at which resonance is likely to occur is
1
103/(6π)
2
1/(6π)
3
104/(π)
4
103/(3)