# Don't slide

A small block $$B$$ is supported by a platform connected at $$A$$ to rod $$OA$$. point $$A$$ describes a circle in a vertical plane at a constant speed $$v_{A}$$, The coefficient of friction between the block and the platform are $$\mu_{s}=\frac{1}{\sqrt{3}}$$ and $$\mu_{k}=\frac{1}{\sqrt{5}}$$. The maximum speed $$v_{A}$$, for the block not to slide on the platform is in $$m/s$$

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