Physics - NLM Question with Solution | TestHub

When a cart moves with some acceleration toward right then a pseudo force (ma) acts on block toward left. This force $(m\alpha )$ is action force by a block on cart Now, block will remain static w.r.t. cart, if frictional force $\mu \mathrm{R}\ge \mathrm{mg}$ $$\begin{array}{crrr}\Rightarrow & \mu \mathrm{m}\alpha & \ge \mathrm{mg}& \text{ [as }\mathrm{R}=\mathrm{m}\alpha \text{ ] }\\ \Rightarrow & \alpha & \ge \frac{g}{\mu }& \end{array}$$