The block is most likely to slip when there is maximum acceleration.
This happens when the blocks are at the extremities where the displacement is either \(+A\) or \(-A\).
$(A)\;y= sin\omega t-cos\omega t$
$(B)\;y=sin^3\omega t$
$(C)\;y=5cos\left( {\frac{{3\pi }}{4} - 3\omega t} \right)$
$(D)\;y=1+\omega t+{\omega ^2}{t^2}$
જ્યાં $A$ અને $K$ ધન અચળાંકો છે.