A Figure Skater on Ice with Arms Extended,spins at a Rate

question 15

Multiple Choice

A figure skater on ice with arms extended,spins at a rate of 3.5 rev/s.After he draws his arms in,he spins at 6.0 rev/s.By what factor does the skater's kinetic energy change when he draws his arms in?

• A)2.4
• B)1.7
• C)0.58
• D)0.12

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Definitions:

Gradually

Occurring in small steps or increments over a period of time; slowly developing.

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Psychological strategies unconsciously used by individuals to protect themselves from anxiety arising from unacceptable thoughts or feelings.

Denial

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Terminal Illness

A disease or condition that is incurable and expected to lead to the death of the patient within a relatively short period of time.