An Ice Skater with Rotational Inertia I₀ Is Spinning with Angular

question 53

Multiple Choice

An ice skater with rotational inertia I₀ is spinning with angular speed ₀.She pulls her arms in, thereby increasing her angular speed to 4 ₀.Her rotational inertia is then:

• A)I₀
• B)I₀ /2
• C)2 I₀
• D)I₀ /4
• E)4 I₀

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Definitions:

Closure

The psychological phenomenon of seeking a sense of resolution or completeness in perceptual or cognitive processes.

Contiguity

A Gestalt principle of perception; the tendency to perceive two things that happen close together in time as being related.

Continuity

A Gestalt principle of perception; the tendency to perceive things as simply as possible with a continuous pattern rather than with a complex, broken-up pattern.

Depth Perception

The visual ability to perceive the world in three dimensions, enabling the estimation of distances.