A motorized wheel is spinning with a rotational velocity of r500 : 1.49I radfs. At t : 0 s, the operator switches the wheel to a higher speed setting. The rotational velocityr of the wheel at all subsequent times is given by com : {marctan (c + bit?) where c = 1.5574 and b = 6.09 53. At what time ram is the rotational acceleration at a maximum? What is the maximum tangential acceleration a, of a point on the wheel a distance R : 1.21 m from its center? a: : 1.2218 mfsz What is the magnitude of the total acceleration of this point