Question

In damped vibrations, the amplitude of the resulting vibration gradually reduces. This is due to the reason that an amount of energy is always dissipated to overcome the ________

(a) Frictional resistance

(b) Work done

(c) Fluid pressure

(d) Air pressure

I got this question by my school principal while I was bunking the class.

The doubt is from Frequency of Free Damped Vibrations in portion Longitudinal and Transverse Vibrations of Machine Dynamics

Answer 1

The correct option is (a) Frictional resistance

The best I can explain: In case of damped vibrations, the amplitude of the resulting vibration gradually diminishes. This is due to the reason that a certain amount of energy is always dissipated to overcome the frictional resistance.