A Person on a Rotating Stool with Arms Stretched Out

question 17

Multiple Choice

A person on a rotating stool with arms stretched out rotates at an angular speed of 5.00 rad/s.On bringing in his arms,the angular speed increases to 7.50 rad/s.By what factor does the moment of inertia change?

• A)0.667
• B)0.750
• C)0.900
• D)1.25
• E)1.50

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Definitions:

Less Dense

Describes a lower mass per unit volume of a substance, often causing it to float atop more dense materials.

Continental Crust

The thick part of the Earth's crust that forms the large landmasses, typically composed of less dense rocks like granite.

Continental Slope

The steep slope extending from the outer edge of the continental shelf down to the continental rise or the ocean floor.

Salt Structures

Geologic formations created by the movement and deformation of salt within the earth's crust.