A 54 N weight is suspended by a spring with a stiffness of 1100 N/m. It is forced to vibrate by a harmonic force of 5 N. Assuming a viscous damping of c=77N-s/m, find
1. The resonant frequency
2. The amplitude at resonance
3. The phase angle at resonance
4. The damped natural frequency
5. The frequency at which maximum amplitude of vibration occurs.
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