Question: A rope is passed over a smooth beam. Two children, the heavier of which has mass 60 kg, hang on to the rope, one on

A rope is passed over a smooth beam. Two children, the heavier of which has mass 60 kg, hang on to the rope, one on either end, so that the heavier one descends with an acceleration of 2 ms-2. The mass of the lighter child, to the nearest kilogram, is

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