An ice skater is spinning about a vertical axis with arms fully extended
PHYSICS · Single correct · AP · Physics 1: Algebra-based · Energy and Momentum of Rotating Systems · Energy and Momentum of Rotating Systems
Problem
1. An ice skater is spinning about a vertical axis with arms fully extended. If the arms are pulled in closer to the body, in which of the following ways are the angular momentum and kinetic energy of the skater affected?
Angular Momentum
(A) Angular Momentum: Increases, Kinetic Energy: Increases
(B) Angular Momentum: Increases, Kinetic Energy: Remains Constant
(C) Angular Momentum: Remains Constant, Kinetic Energy: Increases
(D) Angular Momentum: Remains Constant, Kinetic Energy: Remains Constant
(E) Angular Momentum: Decreases, Kinetic Energy: Remains Constant