Physics

Problem

A flywheel slows down uniformly from an initial angular speed of

20\,\text{rad s}^{-1}

to rest in

4\,\text{s}

. What is the magnitude of its average angular velocity during this interval? a)

12.5\,\text{rad s}^{-1}

5\,\text{rad s}^{-1}

10\,\text{rad s}^{-1}

20\,\text{rad s}^{-1}