Questions

1. What is the difference between the free and forced vibrations?

2. In a damped vibratory system, what will be the phase difference between the input force and the output displacement when the excitation frequency is exactly same as the natural frequency of the system?

3. What will be the phase difference between the input force and the output displacement when the excitation frequency is less than the natural frequency of the system, and when its is greater than the natural frequency of the system?

4. How would you determine the natural frequency of a vibratory system in case of forced vibrations.

5. Give some examples based on the daily-life observations where the harmonic force generates?

6. Give some practical examples where we can observe resonance.

7. How many distinct resonance conditions can exist for an ‘N’ degree of freedom system?