A book is resting on shelf that is under...

A book is resting on shelf that is undergoing vertical simple harmonic oscillations with an amplitude of 2.5 cm. What is the minimum frequency of oscillation of the shell for which the book will lose contact with the shelf ? (Assume that `g = 10 m//s^(2)`)

20 Hz

3.18 Hz

125.6 Hz

10 Hz

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