A skater is spinning with folded arms, and later she extends her arms away from her body. If frictional forces are neglected, the quantity that does not change during this event is
A) the angular momentum.
B) the linear momentum.
C) the kinetic energy.
D) the linear velocity.
E) the angular velocity.

Question

Quizplus · Accepted Answer

The angular momentum of the skater remains constant when she extends her arms away from her body if frictional forces are neglected, due to the conservation of angular momentum.

A Skater Is Spinning with Folded Arms, and Later She