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Two masses 6kg"and 4kg are connected by ...

Two masses `6kg"`and `4kg` are connected by an ideal string passing over a smooth pulley fixed at the ceiling.The magnitude of acceleration of the centre of mass is `(g=10m/s^(2))` (1) `4m/s^(2),` (2) `0.4m/s^(2)` (3) `2m/s^(2),"`(4) `0.2m/s^(2)`

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