A Merry-Go-Round Spins Freely When Janice Moves Quickly to the Center

question 45

Multiple Choice

A merry-go-round spins freely when Janice moves quickly to the center along a radius of the merry-go-round. It is true to say that

• A) the moment of inertia of the system decreases and the angular speed increases.
• B) the moment of inertia of the system decreases and the angular speed decreases.
• C) the moment of inertia of the system decreases and the angular speed remains the same.
• D) the moment of inertia of the system increases and the angular speed increases.
• E) the moment of inertia of the system increases and the angular speed decreases.

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Definitions:

Marginal Revenue

The extra revenue earned by selling an additional unit of a product or service.

Total Revenue

The sum total of financial gains a company secures from its commercial transactions or service provisions during a certain interval.

Quantity Demanded

The aggregate quantity of a product or service that buyers are prepared to buy at a distinct price point, during a specific time frame.

Marginal Revenue

The extra revenue generated by the sale of an additional unit of a product or service.