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

---

Definitions:

Digital Bits

The smallest unit of data in computing and digital communications, representing a binary value of 0 or 1.

Digitizer

A device or component that converts analog signals into digital form, often used in screens to detect touch inputs.

MIDI

Musical Instrument Digital Interface, a protocol designed for recording and playing back music on digital synthesizers.

Synthesized Music

Music created or modified by electronic devices or software through the manipulation of sound waves, enabling the production of new sounds and textures.