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Two masses are connected by a light string passing over a light, frictionless pulley as in this figure (http://www.webassign.net/sercp/p5-63alt.gif). The m1 = 4.85 kg object is released from rest at a point 4.00 m above the floor, where the m2 = 3.15 kg object rests. (a) Determine the speed of...