- #1
Confused_07
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Homework Statement
A 60kg skater begins a spin with an angular speed of 6 rad/s. By changing the position of her arms, the skater decreases her moment of intertia by 50%. What is the skater's final angular speed?
Homework Equations
I understand that I=m*(r^2), so if the radius decreases when she puts her arns in, then the initertia decreases.
The Attempt at a Solution
My attempt at this is that since it decreases by 50%, then the angular speed must increase by two to compensate. Is this correct and that her final speed is 9 rad/s?