When a twirling ice skater brings her arms inward, her rotational speed
A)decreases.
B)remains the same.
C)increases.

Question

Quizplus · Accepted Answer

According to the principle of conservation of angular momentum, when the ice skater brings her arms inward, her moment of inertia decreases, which causes her angular velocity to increase to maintain the same angular momentum. This means that the skater's rotational speed increases.

When a Twirling Ice Skater Brings Her Arms Inward, Her