A man is riding a bicycle, and its wheels have an angular velocity of 18.1 rad/s. Then, the brakes are applied and the bike is brought to a uniform stop. During braking, the angular displacement of each wheel is 18.0 revolutions.
(a) Determine how much time does it take for the bike to come to rest?
(b) Evaluate what is the angular acceleration (in rad/s2) of each wheel?