need help with engineering dynamics review problem

please be clear with your step by step solution so it is to understand

Review Part A The two 1 kg gears A and B are attached to the ends of a 3 kg slender bar. The gears roll within the fixed ring gear C, which lies in the horizontal plane. (Figure 1) If a 10 N . m torque is applied to the center of the bar as shown, determine the number of revolutions the bar must rotate starting from rest in order for it to have an angular velocity of WAB = 15 rad/s . For the calculation, assume the gears can be approximated by thin disks. Express your answer using three significant figures. IVO IT vec ? Figure 1 of 1 the number of revolutions = rev Submit Request Answer 400 mm Provide Feedback Next > B 150 mm 150 mm UM - 10 N. mus P Pearson