An Ice Dancer with Her Arms Stretched Out Starts into a Spin

question 10

Multiple Choice

An ice dancer with her arms stretched out starts into a spin with an angular velocity of 1.00 rad/s. Her moment of inertia with her arms stretched out is 2.48 kg m². What is her angular velocity when she pulls in her arms to make her moment of inertia 1.40 kg m²?

• A) 2.67 rad/s
• B) 2.45 rad/s
• C) 2.03 rad/s
• D) 1.90 rad/s
• E) 1.77 rad/s

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Definitions:

Demand Schedule

A table that shows the quantity of a good or service that consumers are willing and able to purchase at various prices over a specified period.

Marginal Cost

The amount spent on manufacturing one more unit of a product.

Monopoly

A market structure characterized by a single seller, selling a unique product in the market. In a monopoly, the seller faces no competition, as he is the sole seller of goods with no close substitute.

Economies of Scale

Companies experience a decrease in the average cost of production as they scale up their operations, resulting in cost efficiencies.