Jack and Jill have identical exercise bikes with a 15in diameter flyweel (decorated with a star) and begin pedaling at the same instant. Assuming Jill gives her flywheel a constant angular acceleration of 0.1rad/s^2. Jack gives his flywheel an acceleration of 0.deltadeltadeltadelta rad/s^2 until it reaches a maximum speed of 22rad/s. Determine the absolute acceleration of a point on the rim of each of their flywheels at the instant Jack's flywheel reaches 22rad/s.