A ball bearing is moving radially outward in a slotted horizontal disk that is rotating about the vertical Z axis. At one instance, the ball bearing is 3 in. from the center of the disk. It is traveling radially outward at a velocity of 4 in./sec relative to the disk. If theta' = 2 rad/sec and is constant find r'' and the force exerted on the ball by the disk at this instant. Assume no friction and take the weight of the ball to be 0.05 lb.