15 points a system comprised blocks a light frictionless pulley and co
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(15 Points) A system comprised blocks, a light frictionless pulley, and connecting ropes is shown in the figure. The 9.0-kg block is on a perfectly smooth horizontal table.The surfaces of
the 12-kg block are rough, with uk = 0.30 between the block and the table. If the 5.0-kg block accelerates downward when it is released, find its acceleration.7.-