Figure skater spinning with arms in and out

[jmb07]

I need some help just getting moving on this problem...

A figure skater is spinning at a rate of 1.6 rev/s with her arms outstretched. She then draws her arms in toward her chest reducing her rotational inertia to 64% of its original value. What is her new rate of rotation??

I'm not sure how to relate the rate to the inertia...

 

[glueball8]

angular momentum

 

[Hootenanny]

I need some help just getting moving on this problem...

A figure skater is spinning at a rate of 1.6 rev/s with her arms outstretched. She then draws her arms in toward her chest reducing her rotational inertia to 64% of its original value. What is her new rate of rotation??

I'm not sure how to relate the rate to the inertia...

What is the equation which defines the angular momentum of a body?