7. A mass (mı) is connected by a light string that passes over a pulley of…

7. A mass (mı) is connected by a light string that passes over a pulley of mass (m3) to a mass (m2) as shown in the figure. There is no slippage between the string and the pulley. The coefficient of kinetic friction between the mass (mi) and the horizontal surface is 0.25. The inclined surface is frictionless and makes an angle of 30.0° with the horizontal. The moment of inertia of the pulley is 1m3r2. What is the magnitude of the linear acceleration of the system if mı = 2.40 kg, m2 = 1.90 kg, and m3 = 2.75 kg? m2 a. 1.81 m/s2 b. 0.60 m/s2 C. 1.64 m/s2 d. 1.45 m/s2 e. 2.24 m/s2