A Figure Skater Rotating at 5 $2.25 \mathrm {~kg} \cdot \mathrm { m } ^ { 2 }$

question 60

Multiple Choice

A figure skater rotating at 5.00 rad/s with arms extended has a moment of inertia of $2.25 \mathrm {~kg} \cdot \mathrm { m } ^ { 2 }$ If he pulls in his arms so his moment of inertia decreases to $1.80 \mathrm {~kg} \cdot \mathrm { m } ^ { 2 }$ angular speed? what will be his new

• A) 4.60 rad/s
• B) 0.81 rad/s
• C) 2.25 rad/s
• D) 6.25 rad/s

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