A Woman Sits on a Spinning Piano Stool with Her

question 62

Multiple Choice

A woman sits on a spinning piano stool with her arms folded.When she extends her arms,which of the following occurs?

• A)She increases her moment of inertia,thereby increasing her angular speed.
• B)She increases her moment of inertia,thereby decreasing her angular speed.
• C)She decreases her moment of inertia,thereby increasing her angular speed.
• D)She decreases her moment of inertia,thereby decreasing her angular speed.
• E)Both her moment of inertia and her angular speed remain constant.