[Serway] CONNECTED OBJECTS: tension and acceleration

A block with mass m1=4.00 kg and a ball with mass m2=7.00 kg are connected by a light string that passes over a massless, frictionless pulley, as shown in Figure 4.25a. The coefficient of kinetic friction between the block and the surface is 0.300. Find the acceleration of the two objects and the tension in the string.