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Q1) TWO masses initially at rest are connected by a cable, running parallel to their respective surface, which is guided by a pulley as shown in Fig Q1. Mass A is 60kg, mass B is 80 kg, and the pulley is 15 kg, has a diameter of 1.6 m, a radius of gyration of 0.6 m and turns against a constant bearing friction of 20 Nm.

The coefficient of friction for mass A is 0.2 and the coefficient of friction for mass B is 0.25.

Calculate the angular acceleration of the pulley. (16)