A vertical wheel with diameter of 50 cm starts from rest and rotates with constant angular acceleration of 5.5 rad/s2 around fixed axis through its center counterclockwise_ Where is the point that is initially at the bottom of the wheel at t 11 s? Express your answer as an angle in radians between 0 and 2T , relative to the positive € axis_ 0 f radians b. What is the point s tangential acceleration at this instant? m/s2