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# The acceleration of 3 kg mass in figure shown is ( assume $g = 10 m/s^2 )$ :

$\begin {array} {1 1} (1)\;3\large\frac{1}{3}\: m/s^2\: upwards & \quad (2)\;Zero \\ (3)\;16\large\frac{2}{3}\: m/s^2\: downwards & \quad (4)\;3\large\frac{1}{3}m/s^2\: downwards \end {array}$