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A block is on a horizontal table and attached to a string that passes over a pulley and attached to another mass that hangs over the table and is free to fall. The pulley is a solid disk of radius R. The mass of the disk, the block, and the hanging mass are all the same and equal to m. Assume the force of static friction between the block and the table is small enough so that the block slides and experiences kinetic friction with coefficient u_k.

(a) Find the tension in the string on both sides of the pulley.

(b) What is the acceleration of the hanging mass?

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