The 1.7-kg collar at c has an outer diameter of 85 mm and is press fitted to the light 60-mm-diameter shaft. each spoke has a mass of 1.4 kg and carries a 2.6-kg sphere with a radius of 55 mm attached to its end. the pulley at d has a mass of 4.6 kg with a centroidal radius of gyration of 105 mm. if a tension t = 27 n is applied to the end of the securely wrapped cable with the assembly initially at rest, determine the magnitude of the initial angular acceleration α of the assembly. neglect friction in the bearings at a and b and state any assumptions.