Let's look at another example. A ball rolls down a hill at a constant angular acceleration of $0\mathrm{.}200$ rad$/$s$2.$ The ball has an initial angular speed of $1\mathrm{.}20$ rad$/$s$.$

After $14\mathrm{.}0$ s$,$ what is the angular speed $($in rad$/$s$)$ of the ball?

rad$/$s

What is the angular displacement $($in rad$)$ of the ball after the $14\mathrm{.}0$ s$?$

rad

How long does it take for the ball to complete $15\mathrm{.}0$ rotations? Assume it continues at a constant acceleration. $($Enter your answer in s$.)$