Question

An ice skater having moment of inertia I0 rotating with angular speed ω0, suddenly opens his arms causes angular speed to reduce tow0/3 . Then change in moment of inertia of skater is

Choose answer:
200%
50%
100/3%
300%

Answer 1

I think 300 but I m not sure

Answer 2

Answer:

2 0 0 %

Explanation:

When an ice skater abruptly extends his arms, his moment of inertia, I0, which is revolving with angular speed 0, decreases tow 0/3. Consequently, the skater's moment of inertia changes. Choose a percentage: 2 0 0 %.

A figure skater spins with an angular velocity of I while holding her arms out in front of her. She spins more quickly when she brings her arms close to her body. Her angular velocity must rise as a result of a decrease in moment of inertia in order to maintain the same angular momentum.

With her arms outstretched, an ice skater is spinning on the tip of her skate. Because of the negligibly small net torque on her, her angular momentum is preserved. The following shot shows her rate of spin skyrocketing as she draws in her arms, decreasing her moment of inertia.

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