As pictured, two blocks of mass 2m are connected by a rope of tension T3 and pulled along a frictionless surface. Another (massless) rope of tension T2 connects the two blocks to a (frictionless) pulley of mass m/2, which is a disk of radius R. The (massless) rope continues with tension T1 on the other side of the pulley to a hanging mass of mass m.
Referring to the image, the tensions in the ropes satisfy:
Referring to the image, the magnitude of the acceleration of the system is:
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