1. The problem statement, all variables and given/known data A person is riding a bicycle, and its wheels have an angular velocity of +19.5 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 +11.5 revolutions. (a) How much time does it take for the bike to come to rest? (b) What is the angular acceleration of each wheel? 2. Relevant equations avg ang. v=ang. x/t avg ang. a=change in ang. v / t 3. The attempt at a solution I plugged in and got... delta theta=11.5 x 2pi=72.26 radians and 72.26rad/(t) = 19.5 and so t=3.7 or 3.706 or 3.71 and all those are wrong... I dont know what i did wrong.