Physics - NLM Question with Solution | TestHub

Four blocks are arranged on a smooth horizontal surface as shown. The masses of the blocks are given (see the diagram). The coefficient of static friction between the top and the bottom blocks is ${\mu }_{\mathrm{s}}$. If the maximum value of the horizontal force F , applied to one of the bottom blocks as shown, that makes all four blocks move with the same acceleration is $2{\mu }_{\mathrm{s}}\mathrm{mg}\left(\frac{\mathrm{m}+\mathrm{M}}{\alpha \mathrm{m}+\mathrm{M}}\right)$, Then find the value of $\alpha$.