The system, shown in the diagram, consists of a wedge placed on a horizontal surface and a block connected to a string that passes over a massless pulley attached to the wedge. The other end of the string is attached to the wall so that the string is horizontal between the wall and the pulley, and parallel to the inclined surface between the pulley and the block. The wedge and the block have equal masses; angle θ is given. When the system is released from the state of rest, the block begins to slide along the inclined surface of the wedge. Neglecting all friction, find the acceleration of the wedge.
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