Three balls A, B, and C, with masses of 3.0 kg, 1.0 kg, and 1.0 kg, respectively, are connected by massless rods, as shown in the figure. An external force of 13.3 N, acting in the +x-direction, is applied to ball A, while an external force of 4.7 N, acting in the -x-direction, is applied to ball B. What is the magnitude of the acceleration of the center of mass of the three-ball system? y, m 2 0 0 B 1 2 C 3 x, m
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