# pulleys pulleys everywhere!!!

A thin massless thread is wound In a reel of mass 4m and momonet of inertia about its axis is 3m$$R^{2}$$ . Hub radius is R and peripheral radius is 3R (as shown) . The reel is placed on a rough horizontal surface. Friction is sufficient to prevent sliding. Find acceleration (in cgs unit) of centre of mass of reel. [pulleys are massless and frictionless, g =10m/$$s^{2}$$ ]

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