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1 kg and 4 kg blocks lie on a rough hori...

`1 kg` and `4 kg` blocks lie on a rough horizontal surface. The coefficient of friction between `4 kg` blocks and surface is `0.2` while the coefficient of firction between `1 kg` blocks and the surface is `0.6`. All the pulley shown in the figure are massless and frictionless and all strings are massless and frictionless and all strings are massless.

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