Q)
A system consists of three masses $m_1, m_2$ and $m_3$ connected by a string passing over a pulley $P$. The mass $m_1$ hangs freely and $m_2$ and $m_3$ are on a rough horizontal table (the coefficient of friction= $\mu$). The pulley is frictionless and of negligible mass. The downward acceleration of mass $m_1$ is : (Assume $m_1 = m_2 = m_3 = m$) <br>
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