The angular momentum of an isolated object can be changed only by
A) changing its rotational inertia.
B) applying a torque.
C) applying a force along the axis of rotation.

Question

Quizplus · Accepted Answer

According to the principle of conservation of angular momentum, the angular momentum of an isolated object remains constant unless an external torque is applied. Therefore, applying a torque is the only way to change the object's angular momentum. Changing the object's rotational inertia could affect the object's angular velocity, but not its angular momentum. Applying a force along the axis of rotation would not change the object's angular momentum because it would not generate any torque.

The Angular Momentum of an Isolated Object Can Be Changed