A Ballerina Spins Initially at 1

question 35

Short Answer

A ballerina spins initially at 1.5 rev/s when her arms are extended. She then draws in her arms to her body and her moment of inertia becomes 0.88 kg ∙ m², and her angular speed increases to 4.0 rev/s. What was her initial moment of inertia?

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Definitions:

Maximize Profits

The process of making the most favorable decisions to achieve the highest possible earnings after expenses.

Conjectural Variation

An expectation of how rival firms will react to a change in the quantity and price of goods a firm markets.

Demand Function

A mathematical formula that describes the relationship between the quantity demanded of a good and its various determinants such as price, income, and substitute prices.

Cournot Equilibrium Price

A concept in economics where firms reach a state in which each firm chooses the quantity to produce to maximize its profit, given the quantities chosen by other firms in the market.