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

question 58

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 the increase in her rotational kinetic energy when she pulls in her arms to make her moment of inertia 1.40 kg m²?

• A) 0.957 J
• B) 0.902 J
• C) 0.870 J
• D) 0.750 J
• E) 0.690 J

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Definitions:

Wage Rate

The amount of compensation a worker receives per unit of time (e.g., hour, day) or per unit of output.

MRP Curve

Represents the Marginal Revenue Product curve, showing the additional revenue generated by employing one more unit of input, like labor or capital.

Resource Demand

The need or desire for specific resources (labor, capital, land, etc.) driven by businesses and individuals in the production of goods and services.

MRC

The marginal rate of change, representing how a variable changes as another variable (typically quantity) increments by one unit.