during a 4.1 s time interval, a flywheel with a constant angular acceleration turns through 549 radians and acquires an angular velocity of 206 rad/s. (assume the flywheel is rotating in the positive direction. indicate the direction with the signs of your answers.) (a) what is the angular velocity (in rad/s) at the beginning of the 4.1 s? rad/s (b) what is the angular acceleration of the flywheel (in rad/s2)? rad/s2