Question

An ice skater is spinning about vertical axis with arms fully extended. When he folds his arms, then angular speed ____, angular momentum ____ and moment of inertia ____.

• A. Remains constant, increases, decreases
• B. Decreases, remains constant, increases
• C. Increases, remains constant, decreases
• D. None of the above

Answer 1

The correct option is C Increases, remains constant, decreases

While folding arms, moment of inertia decreases, angular momentum remains constant, hence angular speed increases.