An ice skater is spinning with her arms out and is not being
acted upon by an external torque.
a. When she pulls her arms in close to her body what happens to
her angular momentum?
b. When she pulls her arms in, what happens to her moment of
inertia?
c. What happens to her angular speed when she pulls her arms
in?
d. What happens to her rotational kinetic energy when she pulls
her arms in?