Physics

Problem

The net reaction of the disc on the block is a.

\frac{1}{2}m\omega^2 R(e^{2\omega t} - e^{-2\omega t})\hat{j} + mg\hat{k}

\frac{1}{2}m\omega^2 R(e^{\omega t} - e^{-\omega t})\hat{j} + mg\hat{k}

-m\omega^2 R \cos \omega t \hat{j} - mg\hat{k}

m\omega^2 R \sin \omega t \hat{j} - mg\hat{k}