The given Fig. 81 shows vibrations of a mass ' \(M\) ' isolated by means of springs and a damper. If an external force ' \(F\) ' \((=A \sin \omega \mathrm{t})\) acts on the mass and the damper is not used, then

(a) \(\omega=\sqrt{\frac{k}{M}}\)

(b) \(\omega=\frac{1}{2} \sqrt{\frac{k}{M}}\)

(c) \(\omega=2 \sqrt{\frac{k}{M}}\)

(d) \(\omega=\sqrt{\frac{k}{2 M}}\)

Transcribed Image Text:

M F = A sin cot Fig.81 www 2