Q. A figure skater pulls in her arms during a spin. What happens to her angular velocity?

एक फ़िगर स्केटर चक्कर के दौरान अपनी बाँहें खींच लेती है। उसके कोणीय वेग का क्या होगा?

A
Increases
बढ़ता है
B
Decreases
कम हो जाती है
C
Remains the same
वैसा ही रहता है
D
Becomes zero
शून्य हो जाता है

Explanation

Pulling the arms in reduces the skater’s moment of inertia. Since angular momentum is conserved, a decrease in moment of inertia leads to an increase in angular velocity:

L=Iω=constant⇒ω∝1I​

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