An Ice Skater Has a Moment of Inertia Of $5.0 \mathrm {~kg} \cdot \mathrm { m } ^ { 2 }$

question 62

Multiple Choice

An ice skater has a moment of inertia of $5.0 \mathrm {~kg} \cdot \mathrm { m } ^ { 2 }$ when her arms are outstretched, and at this time she is spinning at 3.0 rev/s. If she pulls in her arms and decreases her moment of inertia to 2.0 $\mathrm { kg } \cdot \mathrm { m } ^ { 2 }$ how fast will she be spinning?

• A) 7.5 rev/s
• B) 3.3 rev/s
• C) 10 rev/s
• D) 2.0 rev/s

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Definitions:

Discharge Pattern

The variation in the volume of water that flows in a stream or river over time.

Hydrograph

A chart that illustrates the change in discharge rate over time at a particular location in a river, or any other flow-carrying channel or conduit.

Increases

The act or process of becoming larger or greater in size, amount, number, or degree.

Susceptible to Erosion

A condition describing materials or landscapes that are easily worn away or removed by the action of water, wind, ice, or human activities.