A mass m = 4.0 kg is connected, as shown, by a light cord to a mass M = 6.0 kg, which slides on a smooth horizontal surface. The pulley rotates about a frictionless axle and has a radius R = 0.12 m and a rotatinal inertia I = 0.090 kg?m2. The cord does not slip on the pulley. What is the magnitude of the acceleration of m?
?
?
A. ?2.4 m/s2
B. ?2.8 m/s2
C. ?3.2 m/s2
D. ?4.2 m/s2
E. ?1.7 m/s2
Answer: A
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