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Block A of mass 2.0 kg is pulled along a horizontal table by a force of 15 N, which is applied by a light string that passes over a light frictionless pulley, as shown above. The coefficient of kinetic friction between the block and the surface is 0.25. (a) On the dot below, which represents the block, draw and label the forces (not components) that act on the block as it is pulled across the table. (b) Calculate the magnitude of the acceleration of the block.