Box A, 15 kg, rests on a frictionless horizontal surface connected to box B, 5.0 kg, by a string as shown in the diagram. What is the magnitude of box B’s acceleration?
A) 0.75 m/s2
B) 9.8 m/s2
C) 2.5 m/s2
D) 1.5 m/s2
E) 3.3 m/s2
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