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A 2- kg box and a 4-kg box are attached to either ends of a rope...

A 2- kg box and a 4-kg box are attached to either ends of a rope which goes around a massless, frictionless pulley attached to the ceiling. When let go, the heavier box accelerates downwards, while the lighter one accelerates upwards. Calculate the Tension in the rope connecting the two boxes. (use g = 9.81 m/s^2)   

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