A 46-kg uniform disk ( m) sits on the back of a truck traveling at speed m/s when a constant couple moment is applied to it. The disk initially has no angular velocity and the disk does not slip on the truck. Assume the truck bed is long enough to accommodate any subsequent motion of the disk without the disk running out of horizontal surface on which to roll. Find the velocity of the disk's center at the instant 3.3 seconds later if the truck increases its speed to 12 m/s over the same 3.3-s time interval. Consider positive as being to the right. m/s.