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Q. Three objects with masses m1 = 6.0 kg, m2 = 10.0 kg, and m3 = 18.0 kg, respectively, are attached by strings over frictionless pulleys, as indicated. The horizontal surface is frictionless and the system is free from rest. Using energy concepts, determine the speed of m3 after it moves down a distance of 6.0 m.

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