Question Detail
Question
A figure skater goes into a spin, keeping her arms at her sides. When she extends her arms,...
Correct Answer
Option D is the correct answer.
Detailed Explanation
When she extends her arms, her rotational inertia (moment of inertia) increases because mass is distributed farther from the axis. Since no external torque acts, angular momentum is conserved. Therefore, her angular velocity decreases. The correct statement is that her angular momentum remains the same.
Hint
Conservation of angular momentum: Iω = constant.