Multiple Choice
A mass m2 = 1.5 kg rests on a horizontal table. The coefficients of friction between m2 and the table are µs = 0.3 and µk = 0.25. The mass m2 is attached by strings to masses m1 = 2.5 kg and m3 = 4.5 kg as shown. Masses m1 and m3 hang freely. The system is initially held at rest. After it is released, the acceleration of m2 is approximately
A) 1.9 m/s2
B) 2.4 m/s2
C) 3.0 m/s2
D) zero
E) 13 m/s2
Correct Answer:
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