Physics

Problem

A skater with a moment of inertia of

4.0\,\text{kg}\cdot\text{m}^2

is spinning at

2.0\,\text{rev/s}

with arms extended. When she pulls her arms in, her moment of inertia becomes

1.0\,\text{kg}\cdot\text{m}^2

. What is her new angular speed? a)

4.0\,\text{rev/s}

0.50\,\text{rev/s}

8.0\,\text{rev/s}

6.0\,\text{rev/s}