Two tiny masses are stuck to a disk originally rotating counter-clockwise at 33 rad/s about its center. Mass 1 is located a distance of 0.39 meters from the center and mass 2 is located at 0.73 meters from the center. A constant angular acceleration is applied to the disk and after a time of 1.8 seconds mass 1's tangential velocity is 6 m/s in the +x direction when it is below the disk's center (as in the example in class). What is the magnitude of the tangential velocity of mass 2, in m/s, after 2.5 seconds?