A small ball of mass 26 kg is attached to one end of a 1.6-m-long massless rod, and the other end of the rod is hung from a pivot. Suppose the maximum height reached by the ball is such that the rod is 82 from the vertical. What is the centripetal acceleration in m/s of the ball when the rod is 27 from the vertical? Round your answer to two decimal places. Use 9.81 m/s for the gravitational acceleration.